According to the rules of the library a book can for three weeks and a DVD for one week

问题补充：

According to the rules of the library, a book can for three weeks, and a DVD for one week.

A. borrow

B. kept

C. be kept

D. be borrowed

答案：

A. borrow

B. kept

(答案→)C. be kept

D. be borrowed

解析： borrow 是瞬间动词，而keep 是延续性动词，因后面有for three weeks ,应选C。