Question

—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

Answer 1

A

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。