----- 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

---- 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.

1. A.
   any
2. B.
   either
3. C.
   both
4. D.
   two