Water, which seems so simple and common, is ______ makes life possible.
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A
what
B
that
C
which
D
how
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His ability is never in doubt----the question is _______he is prepared to work hard.
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whether
B
if
C
that
D
where
The question that puzzled them is ____ they can get rid of the air pollution in the area.
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how is it that
B
that how
C
that it is how
D
how it is that
—I drove to Zhuhai for the air show last week.—Is that you had a few days off?
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A
why
B
When
C
what
D
where
What is concerning us greatly is ____ the workers held up in that area yesterday will be set free.
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A
that
B
what
C
when
D
which
Courage is a kind of quality --- and that’s __________it takes to face the challenges in life.
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A
that
B
which
C
why
D
what