题目内容

Emergency line operators must always _______calm and make sure that they get all the information they need to send help.
A．growB．appearC．becomeD．stay
D

试题分析:句意：紧急电话接线员必须总是保持冷静并且确保他们能够获得所有需要的信息以便能够给予人们帮助。A变得；B看上去，出现；C变得，成为；D保持。固定短语：stay calm“保持冷静”，选D。
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