Don’t forget to turn on your radio at 7 p.m. this evening. We’ll be back _______ then.
#26779
A
in the air
B
by air
C
on the air
D
off the air
推荐题目
________ poor health, my father is always cheerful.
#27074
A
In spite of
B
In pursuit of
C
In memory of
D
In case of
Whoever helps the poor, I’ ll be______ him/her. 
#26796
A
in place of
B
in favor of
C
in common with
D
in search of
Seeing their son back home safe and sound, the couple smiled _____.
#27064
A
in peace
B
in relief
C
in return
D
in turn