---How long you the book ?- For only a week.A. have ; borrowedB. did ; lendC. have ;

问题补充：

---How long you the book ? --- For only a week.

A. have ; borrowed

B. did ; lend

C. have ; kept

D. did ; have

答案：

A. have ; borrowed

B. did ; lend

(答案→)C. have ; kept

D. did ; have

解析：句意：你借这本书有多长时间了？仅仅一周。现在完成时可以用来表示发生在过去某一时刻的,持续到现在的动作（用行为动词表示）或状态（be动词表示）常与for（+时间段）,since（+时间点或过去时的句子）连用. 现在完成时中，非延续性动词不能与for和since引导的表示一段时间的状语连用，通常是用相应的延续性动词来代替。borrow对应的延续性状态词是keep。故选C