题目内容
You can certainly leave the classroom as soon as your homework__________.?
A.has done
B.has been done?
C.will be done
D.will have been done
B?
解析:
在时间状语从句中可以用现在完成时表示将来,强调从句的动作发生在主句谓语所表示动作之前。?

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题目内容
You can certainly leave the classroom as soon as your homework__________.?
A.has done
B.has been done?
C.will be done
D.will have been done
B?
在时间状语从句中可以用现在完成时表示将来,强调从句的动作发生在主句谓语所表示动作之前。?