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?
在時間狀語從句中可以用現(xiàn)在完成時表示將來，強(qiáng)調(diào)從句的動作發(fā)生在主句謂語所表示動作之前。?
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