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___ you know the rules of swimming, you will be able to swim well.
#80368
A
Before
B
While
C
Though
D
Once
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Take a taxi , _____ you'll miss your train .
#80516
A
and
B
if
C
otherwise
D
or
Some of my workmates prefer to send to our QQ group ______ news they got.
#30165
A
whatever
B
however
C
whichever
D
whenever
Never stop doing ___________you are fond of.
#31603
A
no matter what
B
whatever
C
if
D
that
      I really don't like art , I find his work impressive.
#31741
A
As
B
Since
C
If
D
While
_____ the Internet brings much profit in, it can cause o lot of social problem.
#80454
A
If
B
While
C
Once
D
When