—How long can I the book ?— Two months. A. buyB. borrowC. keepD. kept

问题补充：

—How long can I the book ?

— Two months.

A. buy

B. borrow

C. keep

D. kept

答案：

A. buy

B. borrow

(答案→)C. keep

D. kept

解析：buy买；borrow借入；keep持有；kept持有。句意：我能持有这本书多长时间？——两个月。结合语境及前文情态动词ｃａｎ，可知选Ｃ。