The doctor must be _______ 24 hours a day, 7 days a week in the boarding school.
#25574
A
on call
B
by hand
C
in sight
D
on spot
推荐题目
The film’s ending follows a set pattern, but, _____, it is worth seeing a second time.
#25961
A
on the other hand
B
in other words
C
all in all
D
in the meanwhile
“When did you become an actor?” “_______ 1995, when I graduated from college.”
#27623
A
After
B
In
C
From
D
Since
