— can I keep the books? —Two weeks. A. How long B. How often C. How far

问题补充：

— can I keep the books? —Two weeks.

A. How long B. How often C. How far

答案：

解析：句意：我能将这些书保留多久？­——两周。A. How long多久，对时间进行提问 B. How often多久一次，对频率进行提问 C. How far多远，对距离进行提问，故选A.