The toughest thing about success is _______ you have to keep on being a success.
#79506
A
that
B
when
C
what
D
why
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In my point of view, the question is not _____ the world is going to have a new economic crisis, but when.
#79429
A
that
B
how
C
what
D
whether
_____ the doctors really doubt is _____ my mother will recover from the serious disease soon.
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A
What; when
B
That; how
C
What; whether
D
That; what
—We were surprised to hear that the reason_______ she gave for her absence was______ her mother was ill.—Yes，we saw her mother was at the supermarket that morning.
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why；that
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which；that
C
that；because
D
why；because
(2013·安徽，21)From space, the earth looks blue.This is ________about seventyone percent of its surface is covered by water.
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A
why
B
how
C
because
D
whether
The question that puzzled them is ____ they can get rid of the air pollution in the area.
#79372
A
how is it that
B
that how
C
that it is how
D
how it is that