Emergency line operators must always _______calm and make sure that they get all the information they need to send help.
#64131
A
grow
B
appear
C
become
D
stay
推荐题目
He ______ be a history teacher.
#76613
A
used to
B
be used to
C
use to be
D
be use to
 I really don't want to go; ________, the weather is so cold outside.
#64269
A
in addition
B
in fact
C
on the contrary
D
in another word
 The problem may not____, but there's no harm to be careful.
#64861
A
arise
B
reduce
C
increase
D
rise