I this book for two weeks. I have to return it now. A. borrowedB. have borrowedC. keptD.

问题补充：

I this book for two weeks. I have to return it now.

A. borrowed

B. have borrowed

C. kept

D. have kept

答案：

A. borrowed

B. have borrowed

C. kept

(答案→)D. have kept

解析：句意：我借这本书已经有两周的时间了。我不得不归还他了。kept表示状态可以持续后面可以加时间段，表示“持有”概念borrowed是借入，瞬间动词 后面不可跟时间段lent是借出，瞬间动词 后面不可跟时间段，根据题意用完成时，故选B，