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
Although he is very young, he is much more experienced than others __ working ability．
#27096
A
in praise of
B
in terms of
C
in search of
D
in need of
The direction_____ which the president would go was kept a secret_____ safety concern.
#25533
A
for, over
B
from, about
C
in, for
D
at, as
______hearing the news that a hurricane was______, most of the people hurried to safer places.
#26342
A
In, on the way
B
Upon, on the way
C
On, in the way
D
As soon as, in this way