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She has never done anything for them, _______ they have done everything for her.
#30515
A
when
B
whereas
C
as
D
because
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________ I had walked for six hours, I was tired out.
#80288
A
After
B
Before
C
When
D
As
_______ is well known is ________ the Diaoyu Islands have been part of China since ancient times.
#31856
A
Which; that
B
That; which
C
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D
That; what
 Although he knew little about the large amount of work done in the field , he succeeded ____other more well-informed experimenters failed.
#80107
A
as
B
unless
C
what
D
where
David is such a good boy ________all the teachers like him.
#34823
A
like
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that
C
which
D
as
Each time ________ they met, they would talk long hours together.
#30161
A
which
B
when
C
during
D
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