Question

----- Have you informed Tom and Ann that some foreign experts will visit our company at 8:00 tomorrow morning?

    ------ Yes, I have. But_____ of them asked me to tell you that they would not be able to come.

       A. any       B. either      C. both       D. two

Answer 1

C

解析:

根据问话中Tom和Ann是两个人，又根据But表示转折，所以选C，both表示两者都。