Đáp án: Having spent 2 hours shopping, they came home with plenty of new clothes. Giải thích: Ta dùng phân từ hoàn thành để diễn tả một hành động xảy ra trước một hành động khác trong quá khứ. Trong câu, hành động “had spent 2 hours” (dành ra 2 tiếng) xảy ra trước hành động “came home with plenty of new clothes” (trở về nhà với rất nhiều quần áo mới), nên ta dùng phân từ hoàn thành cho vế câu chứa động từ “had spent 2 hours”. Dịch nghĩa: Sau khi dành 2 giờ mua sắm, họ trở về nhà với rất nhiều quần áo mới.
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Combine the sentences, using perfect gerunds or perfect participles Thea had broken the flowerpot. She denied it. → _______________________________________________________
Read the passage and choose the best option to fils each blank The Earth’s average (1) _________has increased by about 2 degrees Fahrenheit during the 20th century. What’s the big deal? Two degrees may sound like a small amount, but it’s an unusual event in our planet’s recent history. Earth’s climate record, (2) _________in tree rings, ice cores, and coral reefs, shows that the global average temperature is stable over long periods of time. (3) _________, small changes in temperature correspond to enormous changes in the environment. Scientists have high confidence that global temperatures will continue to rise for decades to come, largely due to (4) _________gases produced by human activities. The Intergovernmental Panel on Climate Change (IPCC), (5) _________more than 1,300 scientists from the United States and other countries, forecasts a temperature rise of 2.5 to 10 degrees Fahrenheit over the next century.
Read the passage and choose the best answer to each of the following questions Trees contribute to their environment by providing oxygen, improving air quality, conserving water, preserving soil, and supporting wildlife. During the process of photosynthesis, trees take in carbon dioxide and produce the oxygen we breathe. Trees, shrubs and turf also filter air by removing dust and absorbing other pollutants like carbon monoxide, sulfur dioxide and nitrogen dioxide. After trees intercept unhealthy particles, rain washes them to the ground. Trees control climate by moderating the effects of the sun, rain and wind. Leaves absorb and filter the sun’s radiant energy, keeping things cool in summer. Trees also preserve warmth by providing a screen from harsh wind. In addition to influencing wind speed and direction, they shield US from the downfall of rain, sleet and hail. Trees also tower the air temperature and reduce the heat intensity of the greenhouse effect by maintaining tow levels of carbon dioxide. Both above and below ground, trees are essential to the eco-systems in which they reside. Far reaching roots hold soil in place and fight erosion. Trees absorb and store rainwater, which reduces runoff and sediment deposit after storms. This helps the ground water supply recharge, prevents the transport of chemicals into streams and prevents flooding. Fallen leaves make excellent compost that enriches soil. Many animals, including elephants, koalas and giraffes eat leaves for nourishment. Fruits are eaten by monkeys, and nectar is a favorite of birds, bats and many insects. Animals also eat much of the same fruits that we enjoy. This process helps disperse seeds over great distances. Of course, hundreds of living creatures call trees their home. Leaf-covered branches keep many animals, such as birds and squirrels, out of the reach of predators. (From Importance and Value of Trees - savatree.com)
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