A.Its chemical elements must be studied.
B.Its temperature must be lowered.
C.Big spaceships must be built.
D.Its atmosphere must be changed.
单选题 | The author’s opinion of child adoption seems to be that ________. | 查看答案 |
单选题 | One of the reasons why the long-term trend of prices has been downwards is that ________. | 查看答案 |
单选题 | He wouldn’t answer the reporters’ questions, nor would he ________ for a photograph. | 查看答案 |
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单选题 | Once you get to know your mistakes, you should ________ them as soon as possible. | 查看答案 |
单选题 | Which of the following statements best describes the organization of the first paragraph? | 查看答案 |
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单选题 | One of the consequences of urban life is that impersonal relationships among neighbors ________. | 查看答案 |
单选题 | To ________ important dates in history, countries create special holidays. | 查看答案 |
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单选题 | There is no doubt that the ________ of these goods to the others is easy to see. | 查看答案 |
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单选题 | The primary solution to environmental problems is ________. | 查看答案 |
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单选题 | His successful negotiations with the Americans helped him to ________ his position in he government. | 查看答案 |
单选题 | Depression is often caused by the ________ effects of stress and overwork. | 查看答案 |
单选题 | According to the author, most students ________. | 查看答案 |
单选题 | We should ________ our energy and youth to the development of our country. | 查看答案 |
单选题 | A human’s eyesight is not as ________ as that of an eagle. | 查看答案 |