___ you know the rules of swimming, you will be able to swim well.
#80368
A
Before
B
While
C
Though
D
Once
推荐题目
Just wait here, ______ you can hang around for a while. Your turn is half an hour away.
#30715
A
or
B
so
C
but
D
and
John got his phone for his birthday, his parents don’t let him use it in school.
#31990
A
however
B
which
C
but
D
when
This is a difficult and stressful job, but one _____ you can really help people.
#33784
A
that
B
where
C
which
D
of which
We’ll have a picnic in the park this Sunday ________ it rains or it’s very cold.
#30506
A
since
B
if
C
unless
D
until
_______ a small number of Australians are bitten by spiders each year, most recover without any medical treatment.
#31526
A
While
B
Unless
C
When
D
Because