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 We worried about ______ he was in good health.
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whether
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if
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that
D
what
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The foreiger knows little about ______ is called "Hope Project" in China.
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what
B
that
C
which
D
it
He isn't such a man ______he used to be.
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who
B
whom
C
that
D
as
The question came up at the meeting____________ we had enough money for our research.
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that
B
what
C
which
D
whether
 —I can never forget the days       we spent together in the summer camp.—Well, especially the day       it suddenly began to rain in the middle of the night.
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A
when; when
B
which; when
C
what; that
D
on which; when
Suddenly the idea came to me       I might turn to Mr. Smith for help.
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A
what
B
that
C
which
D
whom