----- We haven’t heard from Jane for a long time.

----- What do you suppose ______ to her?

  A. was happening   B. to happen  

  C. has happened   D. having happened

C


解析:

 do you suppose 為插入語(yǔ),本句應(yīng)該與上句一樣用完成時(shí)態(tài)。

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Dear editor,

I’m a student of Senior Three in a middle school in Fujian Province.

In order to make the best of learning ________ (材料), the Students’       

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The Babylonians and Chinese were using wind power to

pump water for irrigating crops 4,000 years ago, and sailing

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