Read the passage and choose the best answer to each of the following questions.

There are many ways for dioxin, the toxic contaminant in Agent Orange, to enter the human body.

To estimate the number of Vietnamese who have been impacted by Agent Orange, it is necessary to separate the exposure into three modalities. First is the past direct exposure to the poison in wartime. Second are those who may have been exposed to dioxin during or immediately following wartime through the contaminated soil or consumption of contaminated fish and animals. Third are those who are currently being exposed to the dioxin contaminant that remains in the soil. In addition, there are those in the second and even third generations who were not directly exposed but are potentially being impacted due to their parent’s or grandparent’s exposure.

The population of South Viet Nam during the years of herbicide spraying was approximately 18 million. Jeanne stellman and her colleagues at Columbia University Mailman School of Public Health estimated that up to 4.5 million Vietnamese were living in the 3,181 villages that were directly in the spray paths and were potentially exposed to the dioxin. In addition, approximately a million more soldiers who were fighting in southern Viet Nam during the war were potentially exposed as they traveled through the sprayed areas.

Unfortunately, there are not any firm figures for the number of adults who suffer from or have already died from illnesses associated with exposure to Agent Orange. We also do not know for sure how many children and youth have disabilities that may be attributed to their parents’ or grandparents’ exposure to the herbicides.

(Excerpted from Agent Orange Record)

1.  There are_________modalities of dioxin exposure.

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 10:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 9:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 8:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 7:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 6:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 5:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 4:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 3:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 2:

Listen to John Keith, a fitness instructor, talking about four types of physical activity. Listen carefully and fill in the blanks with ONE word for each blank. Your browser does not support the audio element.

My name’s John Keith and I’ve been a fitness instructor for more than ten years. Today I’d like to talk about the precautions we all need to take when doing different types of physical activity. Aerobic exercise seem very simple and easy to do. However, studies have shown that if you do your(1)_________outdoors in the hot and sunny weather, your body can overheat and lose a lot of fluid. This can lead to heat stroke. You should drink a glass of water before a workout and then pase regularly to drink more. You should also exercise early in the(2)________when it’s not too hot. Next is simming. It’s very important to be safe in the water. Swimming pools may look safe, but you should always(3)________the pool water before jumping in. Cold water can make your blood pressure and heart rate go(4)_______. Make sure you have warmed up your boby by stretching or jumping. Don’t swim in bad weather, especially in the rivers, lakes or the sea. If you are swimming and lightning strikes, you risk serious(5)_______or death.

Now, how about yoga? This exercise may look easy and suitable for people of all(6)_____. However, if it’s not done properly, it can do more(7)_______than good. You need to do some warm-up exercise such as stretching before you start your yoga practice. This will relax your(8)____and prevent any dammage to your joints.__________ The last type of physical activity is fitness(9)_______. First, you need good(10)______to keep you comfortable and pain-free. Next, when yo walk, don’t look at your feet. This will slow you down and cause back pain. Finally, remember to bring water with you and drink at least 150ml for every 15 minutes of walking. That’s all from me for today. Hope you find these safety precautions useful. Thanks for listening.

Question 1: