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.grow B.appear? C.become D.stay
D
四个选项后都可接形容词作表语,但A、C两项是表示动态变化的动词,不符合句意;appear意为“看上去”,也不符合句意;stay calm保持镇静,stay用作系动词,意为“保持(某种状态)”。
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