— I wonder how the girl got lost.—She may have been separated from the other students and ______ have heard anyone when the thunder started.

题型：单选题题类：常考题难易度：普通

北京市海淀区2017-2018学年高二上学期英语期中考试试卷

— I wonder how the girl got lost.

—She may have been separated from the other students and ______ have heard anyone when the thunder started.

A、mustn't B、needn't C、couldn't D、shouldn't

举一反三

—Boy, you ________. Our neighbor has offered to help us.

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