问题
选择题
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
答案
答案：D
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.