.Emergency line operators must always ______ calm and make sure that they get all the information they need to send help.
#82116
A
grow
B
appear
C
become
D
stay
推荐题目
I haven’t seen you for ages. How are you ______ with your English study?
#71548
A
holding on
B
going on
C
keeping on
D
getting on
Our English teacher is ill, and we are all ______ her health.
#68762
A
concerned about
B
careful of
C
grateful for
D
calm down
What worried the woman most was ______ to visit her sick son in hospital. 
#72662
A
not allowing
B
not being allowed
C
not allowed
D
having not being allowed