. _____is known to us all, America is a developed country____ the first world.
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A
As; belonging
B
which; belonged
C
as; belonging to
D
which; belonged to
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(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
He went to the station hurriedly only ______that the bus had gone away.
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A
to tell
B
to be told
C
telling
D
being told
We were shocked at the news____________a 7.1-magnitude quake struck Yushu county on April 14th.
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A
whether
B
that
C
where
D
Why