问题补充:
— John, you go out to play until your homework .
—OK, Mum.
A. must; finishes
B. can’t; is finished
C. can’t; has finished
D. needn’t; finishes
答案:
A. must; finishes
(答案→)B. can’t; is finished
C. can’t; has finished
D. needn’t; finishes
解析:考查情态动词和动词被动语态的用法。该句使用了not…until结构,意思是:直到你完成了作业,才能出去玩。第一空用can’t表示“不能”; homework是finish动作的承受者,它做主语时,用被动语态;此处是状语从句,用一般现在时表示将来。
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