The story took place in Europe in the days before automobiles __ everyone used horses.
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which
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when
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where
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as
推荐题目
The companies are working together to create ______ they hope will be the best means of transport in the 21st century.
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which
B
that
C
what
D
who
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
To improve the quality of our products, we asked for suggestions _____ had used the products.
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whoever
B
who
C
whichever
D
Which
Recently a new social issue has been brought to everyone’s attention ___ __food additives are abused．
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when
B
whether
C
that
D
which