Shirley a book about China last year, but I don't know whether she has finished it.
A. has written
B. wrote
C. had written
D. was writing
网友回答
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.