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 by 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:
这题考查时态, by“到什么时候为止”,和相应的完成时连用,根据上下文,时间是:by then指“到今晚五点为止”,所以用将来完成时。