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There is plenty of rain in the southeast,         there is little in the northwest. 
#31678
A
because
B
therefore
C
while
D
as
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It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it. 
#32181
A
that
B
whether
C
how
D
what
The murder happened in an old building, beside ______ the city police station.
#34709
A
which are
B
it is
C
which is
D
them are
Don’t start reading a book _____ you find that it’s one you can read with ease and understanding.
#32304
A
when
B
if
C
unless
D
Though
—Oh, I failed again—Don’t lose heart. One more effort, ________ you will succeed. 
#80290
A
so that
B
therefore
C
however
D
and
It’s really very dangerous. One more step, _____the baby will fall into the well.
#30992
A
or
B
so
C
but
D
and
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