单选题In the middle of the night the sleeping campers were alarmed by a loud crash.AexcitedBsignaledCfrightenedDwarned

单选题
In the middle of the night the sleeping campers were alarmed by a loud crash.
A

excited

B

signaled

C

frightened

D

warned


参考解析

解析:
句意:午夜,一声巨响惊动了正在熟睡的露营的人。frighten惊恐,惊吓。excite刺激;激励。signal用信号通知。warn警告。

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