Emergency line operators(接线员) must always calm and make sure that they can get all the i

问题补充：

Emergency line operators(接线员) must always calm and make sure that they can get all

the information they need to send help.

A. grow

B. remain

C. appear

D. look

答案：

A. grow

(答案→)B. remain

C. appear

D. look

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