______ you make a promise, you should keep it.
#31679
A
The moment
B
While
C
Once
D
As if
推荐题目
Our government has taken some measures to overcome the lack of electricity, but it may take some time _____ we have enough power.
#33827
A
since
B
after
C
unless
D
before
_By success I don’t mean_______usually thought of when that word is used.
#80066
A
what is
B
what has
C
that is
D
that has