My father has done a lot of reading and writing the year.A. overB. for C. atD. on

问题补充：

My father has done a lot of reading and writing the year.

A. over

B. for

C. at

D. on

答案：

(答案→)A. over

B. for

C. at

D. on

解析：over 强调在某一段时间内反复发生的事；只表示一段时间，强调时间的长度。