问题
选择题
----- 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
答案
答案：C
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。