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(2014·河南豫北三校高三下学期联考)—May I go and play with Dick this afternoon,Mum?

—No,you can’t go out________your work is being done.

A.before B.until

C.as D.the moment

 

C

【解析】此题容易误选B,误认为这是考查not...until...结构。句中的your work is being done表明“你正在做作业”,as表原因。

答案: C

 

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