--Your effort is sure to pay __________ ---Thank you for your encouragement.
#27298
A
off
B
for
C
back
D
down
推荐题目
The business is said to be _____ of a director . 
#27289
A
under the control
B
under control
C
in the control
D
in its control
Experts have been warning _____ of the health risks caused by passive smoking.
#28424
A
at a time
B
at one time
C
for some time
D
for the time