Shirley a book about Tibet 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：根据时间状语last year，可知要用过去时态，but I don’t know whether she has finished it.但是我不知道她是否写完了，可知是去年正在写，而不是写了一本书。所以选D。