Emergency line operators must always ________ calm and make sure that they get a

题干

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

上一题下一题 0.64难度单项选择更新时间:2017-08-03 12:45:48

小学学科试题库

初中学科试题库

高中学科试题库