Cars play an important role in modern life, but they_______a

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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袁去华幼苗

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B

考查情态动词。这里的肯定句表示“有时会，可能会”，用can。注意can与must都能用于肯定句中表示肯定的推测与判断，表示具体情形的推测判断用must，而can表示一般性的叙述，“有时会”。

1年前

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