问题
选择题
Emergency line operators must always _____ calm and make sure that they get all the information they need to send help.
A．grow
B．stay
C．appear
D．become
答案
答案：B
这题考查连系动词的用法，stay calm“保持冷静”，grow、become强调变化，appear似乎，都不符合。选B。