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【题目】We shouldn’t cross the road the light turns green.

A. when B. while C. until D. as

【答案】C

【解析】如果主句用否定形式,从句用肯定形式,表示“直到…………”,并且主句的为语动词为非延续行动词如:leave,start,come,see,go to bed等,表示这一动作直到until才开始发生,故选择C。

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