(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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Do you happen to know ________?
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A
whereisheraddress
B
inwhichplaceisheraddress
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whatheraddressis
D
theplaceheraddressis
It was not long________the whole country rose up and drove the enemy out of their country.
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when
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The final exam is a battle _______ everybody wants to show off his or her talent.
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A
that
B
what
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where
D
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—Was it last summer you luckily got an opportunity to spend your holiday in Hawaii ?—Not me . John was the lucky dog .
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A
that
B
when
C
which
D
what