问题补充:
Mr Smith a book about China last year but I don’t know whether he 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:考查时态。句意:去年史密斯先生一直在写一本关于中国的书,但是我不知道他是否已经完成了。结合语境可知前文描述的是在过去一直在进行的动作,故用过去进行时态,选D。