【題目】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，從句用肯定形式，表示“直到……才……”，并且主句的為語動詞為非延續(xù)行動詞如：leave，start，come，see，go to bed等，表示這一動作直到until才開始發(fā)生，故選擇C。

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