It_____ have been Tom that parked the car here, as he is the only one with a car.

A. may        B. can             C. must          D. should

C 


解析:

考查情態(tài)動詞表猜測的用法。由as he is the only one with a car. Ks5u可知一定

可知一定是他把車停在這里的，較為肯定的推測。

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