Shirley a book about China last year but I don't know whether she has finished it.A. has

问题补充：

Shirley a book about China last year, but I don know whether she has finished it.

A. has written

B. wrote

C. had written

D. was writing

答案：

A. has written

B. wrote

C. had written

(答案→)D. was writing

解析：受last year的干扰而误选B项，但句意为Shirley去年（一段时间）在写一本有关中国的书，但我不知她现在是否写完，因此答案为D.