______ you understand the rule, you can do it well.
#79900
A
For
B
As
C
Once
D
While
推荐题目
_______ there are many different types of food, some animals spend their lives eating only one type.
#30197
A
Since
B
Unless
C
Once
D
While
—Could you please lead your car to me this Sunday? —_________you have it cleaned after using it.
#34785
A
Although
B
So long as
C
Even if
D
As soon as
—Was it under the tree _______ you were away talking to a friend?—Sure. But when I got back there, the bike was gone.
#31375
A
that
B
where
C
which
D
while
She says that she'll have to close the shop ________ business improves.
#31017
A
if
B
unless
C
after
D
when
It just isn't fair ________ I was working as a cleaner last month; my friends were on a visit to Dalian.( 2012·湖北八校联考)
#29959
A
whenever
B
though
C
for
D
while