—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
网友回答
(答案→)A. will have gone
B. had gone
C. would have gone
D. has gone
解析：考查时态。then指代at five o’clock，由语境可知是将来时间。将来完成时表示将来某时之间或某动作之前已经完成的动作。