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-I'm sure Andrew will win the first prize in the final.-I think so. He for it fo

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-I'm sure Andrew will win the first prize in the final.-I think so. He for it fo

-I'm sure Andrew will win the first prize in the final.
-I think so. He________for it for months.  [     ]A. is preparing    
B.was preparing
C. had been preparing    
D.has been preparing

试题答案

D