Read the following passage and write the letter A, B, C or D to indicate the correct answer to each question.

Cycling which can help to increase your strength and energy is one of the best forms of exercise. It makes your muscles and heart stronger. Cycling not only improves your strength but it also a good form of exercise for people with painful feet or back because they do not have to carry the weight of their body on their feet. However, with all forms of exercise, it's important to start slowly and build up gently. Doing exercise too much and too quickly can damage muscles that aren’t used to working so hard.

If you have and doubt about taking up cycling to stay healthier, talk to your doctor and ask for his/ her advice. Ideally, you should cycle at least two or three times a week. To do live exercise well, you should practise breathing properly. If you begin to lose your breath, you may think that there is something wrong with your heart and it could be dangerous. Don't worry about that because the shortness of breath shows that the exercise is having the sight effect. However, if you feel you ore in severe pain, you should stop and take a rest.

People with back problems might go cycling because ______.

Read the following passage and write the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Renewable energy sources are the forms of alternative energy that are being constantly renewed by the (31) ______ processes of the Earth, (32)______  the sunlight from the sun or the wind from the air, and are therefore environmentally friendly. Renewable energy has been used as a clean, renewable, and affordable energy source in one way or another for thousands of years. (33) ______ the world needs to replace fossil fuels with alternatives that are replenishable, (34)______  energy resources, even renewable energy sources are limited.

The use of renewable energy sources is definitely what we want to move (35)______ in the future, but their cost and reliability will admit how quickly (36)______ will grow. Wind and solar photovoltaic power generation has the most potential for growth since the cost of generating green electricity using these devices has decreased a lot in the past couple of decades. (37) ______, the (38)______  in weather conditions, geography (39) ______energy demand usually means that every type of energy storage in needed to (40)______ a constant supply.

Circle the correct answer A, B, C or D.

Rewrite the sentences with the suggesting words by a way that have the same meaning as the following sentences.

It’s a pity I didn’t take my doctor’s advice.

Use the correct form of the words in brackets to complete sentences.