_______ medicine works in a human body is a question _______ not everyone can understand fully.
#77918
A
How; that
B
That; which
C
That; which
D
What; that
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With economy getting worse，we have reached the point________we have to cut down our daily expenses.
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that
B
which
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when
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where
People take naps at noon in warmer climates, ____ the heat makes work difficult in the early afternoon.
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which
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what
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where
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Lucy didn’t do well in this exam, ______ made her mother quite unhappy.
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that
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it
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which
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this