. The book, _______ is blue, is mine.
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A
the cover of which
B
whose cover
C
of which the cover
D
all the above
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______ the bad weather, the children had to stay home all day.
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A
Because of
B
Because
C
Because that
D
Because what
If Tom had spent more time studying, he able to do well in the test now.
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A
will be
B
would be
C
has been
D
would have been