(2013·安徽，21)From space, the earth looks blue.This is ________about seventy－one percent of its surface is covered by water.
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A
why
B
how
C
because
D
whether
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The reason_______ his being late for school was______ he missed the train.
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A
for because
B
why that
C
why because
D
for that
I'd like to work with ______ is honest and easy to get on with．
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A
who
B
whoever
C
whomever
D
no matter who
The village people，in_______school Anna is teaching，are very kind to her.
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A
which
B
that
C
whose
D
where