All his attempts to unlock the door were , because he was using the wrong key.
#27426
A
in return
B
in vain
C
in doubt
D
in time
推荐题目
— Can you stay here and help me _______ ? — Sorry, I have a meeting to attend _______.
#27193
A
at the moment; for a moment
B
for the moment; in a moment
C
at that moment; in a moment
D
for the moment; for the moment
Young children are often advised not to spoil their appetite by eating sweets ________ the three meals.
#26370
A
among
B
during
C
between
D
through
Nothing is more important than health, so it is unwise to build up our business ________ our health.
#26639
A
at the mercy of
B
at the expense of
C
in face of
D
in relation to
If you don’t wait _______ the red light, you will be punished by the policeman.
#28521
A
at
B
under
C
for
D
on