The computer, help we human beings have stepped into the information age, should be regarded as one of the most important inventions in the 20th century.
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which
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whose
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with its
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with whose
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He made a promise he would not play computer games again at school.
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which
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where
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how
D
that
I’ve become good friend with several of the student in my school _______I meet in the English speech contest last year.
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who
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where
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when
D
which
If we forgave criminals, we might become a society of endless excuses no one accepts responsibility for anything．
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which
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where
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when
D
as
Rock-climbing is a breathtaking activity, very popular nationwide among young people, ______ cooperation as well as courage plays an important role.
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who
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where
C
which
D
of which
The two things _______they felt very proud were Jim’s gold watch and Della’s hair.
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about which
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of which
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in which
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for which