题目内容
18.-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 |
分析 --约翰,直到你的作业做完了,你才能出去玩.
--好的,妈妈.
解答 答案:B not…until…意为"直到…才",not用在主句中,until引导后面的从句.根据作业是被做完的,要用被动语态,故选B.
点评 有些结构是分开用的,并不是连在一起使用的,这时候就要注意发现这些搭配,要不就很容易造成误选错选.
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