科目: 来源: 题型:选择题
| A. | What an | B. | What | C. | How | D. | What a |
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科目: 来源: 题型:选择题
| A. | had come | B. | will come | C. | would come | D. | came |
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| A. | depend | B. | to depend | C. | depending | D. | depends |
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科目: 来源: 题型:选择题
| A. | keeping | B. | keep | C. | to keep | D. | keeps |
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科目: 来源: 题型:选择题
| A. | observe | B. | observes | C. | to observe | D. | observing |
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| A. | how could I protect myself from the air pollution | |
| B. | how can I protect myself from the air pollution | |
| C. | how I could protect myself from the air pollution | |
| D. | how I protect can myself from the air pollution |
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科目: 来源: 题型:选择题
| A. | go | B. | to going | C. | going | D. | to go |
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科目: 来源: 题型:阅读理解
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科目: 来源: 题型:选择题
| A. | On | B. | In | C. | By | D. | With |
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科目: 来源: 题型:选择题
| A. | who; fifth | B. | that; five | C. | /; five | D. | which; fifth |
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