、The virtues of thrift（节俭）and hard work is vital for everyone, is often the case in any society.
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A
as
B
that
C
when
D
where
推荐题目
Mark Twin wrote many popular novels in his life, ________ The Adventures of Tom Sawyer is a best example.
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of which
B
what
C
whose
D
which
My neighbors used to give a hand in time of trouble, was very kind of them.
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A
who
B
that
C
what
D
which
The factory which produced fake wine in our city, _______ was shown in the news report, has been closed by the government.
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that
B
it
C
what
D
as
At present, we are studying a total of nine subjects, ________ I think is physics.
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of them the most difficult
B
and the most difficult of which
C
the most difficult of them
D
the most difficult of which