you should___at the red light .but you didn't.A.stop B,have stopped.

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you should___at the red light .but you didn't.A.stop B,have stopped.
you should___at the red light .but you didn't.A.stop B,have stopped.

you should___at the red light .but you didn't.A.stop B,have stopped.
答案:B
这里用虚拟语气,用情态动词should + have + 过去分词,这是对过去的一种虚拟.