An ambulance was waiting in the street, somebody______hurt or killed.A、should ha

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问题 An ambulance was waiting in the street, somebody______hurt or killed.

选项 A、should have been
B、must have been
C、should be
D、should not have been

答案 B

解析本题综合考查情态动词，从句是过去的事实，主句用must have+过去分词，表示对过去发生的事情的肯定推测。题意为，一辆救护车停在街上，准是有人受伤或被杀了。

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