---- Have you informed Tom and Ann that some foreign experts will visit our pany at 8:00 tomorrow morning? ---- Yes, I have. But_____ of them asked me to tell you that they would not be able to e.A.anyB.eitherC.bothD.two
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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。