－Is Mary in the library Tom?－No. She with her friends.A. will playB. playsC. is playingD

问题补充：

－Is Mary in the library, Tom?

－No. She with her friends.

A. will play

B. plays

C. is playing

D. played

答案：

A. will play

B. plays

(答案→)C. is playing

D. played

解析：玛丽不在图书馆，那么根据地面意思应该正在做某个事情，下句应该用进行时态，结构为be+doing，故选C。

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