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．

will have been

Answer 1

答案：A
解析：

句中的long before then提供了关键的时间参照，意思是“Williams先生将远在这个时间之前就去开会去了”。故句子用将来完成时态。