Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it. 　

A. has written 　　B. wrote 　　　 C. had written 　　D. was writing

Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.

A. has written 　    　B. wrote 　    　　 C. had written 　    　D. was writing

Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.

1. A.
   has written
2. B.
   wrote
3. C.
   had written
4. D.
   was writing