-- May I speak to your manager Mr. Williams at five o’clock tonight?--I’m sorry. Mr. Willi

问题补充：

-- May I speak to your manager Mr. Williams at five o’clock tonight?

--I’m sorry. Mr. Williams to a conference long before then.”

A. will have gone

B. had gone

C. would have gone

D. has gone

答案：

(答案→)A. will have gone

B. had gone

C. would have gone

D. has gone

解析：句意：--我可以和你的经理威廉先生今晚五点通上电话吗？--对不起，在五点之前威廉先生将去参加会议。因为今天五点还没有到，所以应该用将来时，而表示在五点之前，所以应该用将来完成时，故选A。