--- I wonder how much you charge for your service. --- The first two are free ______ the third costs $30.
#32246
A
while
B
until
C
when
D
before
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He will spend six hours at his desk _______ he finishes his composition.
#79623
A
before
B
until
C
after
D
when
In some countries such as France or Italy, it’s common to exchange a kiss when shaking hands, ______ in China, it’s not acceptable.
#30709
A
while
B
when
C
if
D
because
It is uncertain ________ side effect the medicine will bring about, although about two thousand patients have taken it.(2010·浙江)
#29978
A
that
B
what
C
how
D
whether
As a matter of fact, ________ matters most in learning English is enough practice.
#30329
A
where
B
why
C
which
D
what