Cars play an important role in modern life, but they ______

Cars play an important role in modern life, but they ______ also cause many problems like air pollution.
A. should
B. can
C. must
D. will

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zhuhai369 幼苗

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答案B
考查情态动词的用法.should应该,can有时候可能会,must必须,will将会,句意：汽车在相待生活中起着非常重要的作用,但是,他们有时候可能也会引起许多为题像空气污染.故选B.

1年前

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