摘要： ------- of Yangzhou has Mr. Smith covered since he came here last month? ------- About half of it, I think. A. How much B. How far C. How wide D. How large
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_____finish their task ahead of time, the students worked harder and harder
- A.In order to
- B.So as to
- C.As to
- D.In order not to
Scientist are not sure about the ___________ of water on the Mars
- A.occupation
- B.existence
- C.demand
- D.treasure