、The virtues of thrift（节俭）and hard work is vital for everyone, is often the case in any society.
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as
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推荐题目
Li Ning was able to set up a school for gymnasts in 1991, ______ he has continued to help young people to achieve their sporting ambitions.
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when
B
dring which
C
since then
D
since when
Your speech was heard by a group of judges, all of _______ agreed that it was the best one this year..
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who
B
whom
C
which
D
them
Have you ever noticed the house, ________ windows are always closed?
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where
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which
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when
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whose
These articles are written in simple language, ____ _ makes it easy to read.
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which
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this
C
that
D
it
Language learning，________ the expert pointed out in his lecture，is more than remembering words and phrases.
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as
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which
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that
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what