(2013·银川高三二模)It remains to be seen ________ this plan is practical enough to keep the project going.
#30416
A
whether
B
how
C
where
D
when
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Everyone tells me I’m a good speaker, _____ I really don’t like speaking in public.
#30140
A
and
B
so
C
but
D
or
The new system needs to be in operation for five months ________ it can be updated.
#30274
A
as
B
while
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before
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once
Feathers fall to the ground slowly,________ stones fall much faster.
#80177
A
but
B
however
C
while
D
yet
-– I wonder how much you charge for your services.--- The first two are free the third costs $30.
#80672
A
while
B
until
C
when
D
before