The company has a free long-distance telephone number_____ customers may call with any questions they have about the products .
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A
when
B
so that
C
while
D
as
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____ I’ve known your situation, I’ll send the money to you imediately.
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A
Now that
B
In case
C
On condition that
D
So long as
(2013·山东卷)There is no simple answer，________is often the case in science.
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A
as
B
that
C
when
D
where