15. In an emergency, you should remain .A. calmB. silentC. quietD. Tranquil

发布时间:2020-08-16 06:38:01


15. In an emergency, you should remain     .
A. calm
B. silent
C. quiet
D. Tranquil

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(答案→)A. calm
B. silent
C. quiet
D. Tranquil
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