--- 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：考察时态，根据上一句的tonight可知，该句用一般将来时，只有A符合要求，
句意为---我今晚五点能和你们的经理通电话吗？-----对不起，在那之前他就将已经去开会了。