After three years of preparation for the 2011 Xi’an International Horticultural Expo (西安园博)会），the city is presenting the world______ many people think is the green Special Olympics．
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that
B
which
C
what
D
where
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David knocked at the door for nearly half an hour______Mary opened it, unwilling.
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when
B
while
C
until
D
before
The seaside here draws a lot of tourists every summer. Warm sunshine and soft sands make ___________it is.
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what
B
which
C
how
D
where
It has been many years since I was last in London_______I still remember something that happened during that visit.
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and
B
for
C
but
D
as
Be sure to take a trip to the Wadesell． it's a long drive on a dirt road，it's well worth the trouble．
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Only if
B
Now that
C
Even though
D
In case
Why not try your luck downtown, Bob? That’s __________the best jobs are.
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A
where
B
what
C
when
D
why