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We believe scientists will ______ a way to solve the problem of air pollution.

A. set off
B. put off
C. come up with
D. catch up with
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科目：初中英語 來源：同步題 題型：單選題

We believe scientists will ______ a way to solve the problem of air pollution.
[     ]
A. set off
B. put off
C. come up with
D. catch up with

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科目：初中英語 來源： 題型：單選題

We believe scientists will ________ a way to solve the problem of air pollution．


  1. A.
    set off
  2. B.
    put off
  3. C.
    come up with
  4. D.
    catch up with

查看答案和解析>>


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