题目内容

【题目】She won't agree to buy a computer ______ her son promises not to play computer games.

A. whenB. until

C. andD. so

【答案】B

【解析】

句意：直到她的儿子答应不玩电脑游戏，她才同意买电脑。

when当…时候；until直到…时候；and和，而且；so因此，所以。根据句意可知，这里考查的是not…until…句型，意为“直到…时候，才…”。故应选B。

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