(2013·安徽，21)From space, the earth looks blue.This is ________about seventyone percent of its surface is covered by water.
#79357
A
why
B
how
C
because
D
whether
推荐题目
The present question is ____ many students consider it impossible ____ is really possible if effort is made.
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A
what; that
B
that ; that
C
that; what
D
what; what
The question that puzzled them is ____ they can get rid of the air pollution in the area.
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A
how is it that
B
that how
C
that it is how
D
how it is that
Making mistakes is a part of life. ___________ matters is ___________ you do afterwards.
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A
It; what
B
All; what
C
What; what
D
That; what
He was seriously injured last week and that’s _______ he didn’t participate in the competition.
#79363
A
when
B
how
C
why
D
what
_______ is even important is ______ as the earth cooled down, water began to appear on its surface.
#79375
A
That, that
B
What, that
C
What, what
D
It, that