"May I speak to your manager Mr. Williams at five o’ clock tonight?" "I’m sorry. Mr. Williams ______ to a conference long befor

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问题 "May I speak to your manager Mr. Williams at five o’ clock tonight?"  "I’m sorry. Mr. Williams ______ to a conference long before then."

选项 A、will have gone
B、had gone
C、would have gone
D、has gone

答案A

解析 根据题意,可见before then相当于before five o’clock tonight,表示的是在将来某个时间之前要完成的动作,因此此处谓语动词要使用将来完成时。例如:The railway will have been completed long before then.那条铁路将在此之前早就建成了。The tree will have withered long before it falls.大树久枯始倒下。
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