(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
推荐题目
Believe it or not, that is _______ we have dreamt about for twelve years.
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A
when
B
which
C
why
D
what
—These days I feel exhausted and lack strength.—That’s _____too much drinking and poor diet lead.
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A
what
B
which
C
why
D
where
—Children must have access to good books.—I can't agree more. Reading is to the mind ________ food is to the body.
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A
that
B
what
C
like
D
as
The doctor’s dilemma was _____ he should tell the patient the truth.
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A
whether
B
which
C
that
D
what
The reason________he was late was ________he missed the train.
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A
that; why
B
that; that
C
why; that
D
why; why