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
. The continuous rain was _____ for the exceptional poor harvest
#78562
A
blamed
B
condemned
C
accused
D
charged
He devoted most of his time to researching into space, believing his hard work would ______ sooner or later.
#73539
A
pay back
B
pay for
C
pay off
D
pay up