Cars play an important role in modern life, but they_______also cause many probl
题型：不详难度：来源：
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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答案
| B |
解析
| 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”。 |
举一反三
--You just think of yourself! You kept me waiting for at least three hours．
–I am sorry that you________think so.| A．would | B．should | C．could | D．might |
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——Hi, Mike．Any idea where Mary is?
——She ____ in the classroom．I saw her there just now．| A．shall be | B．should have been | C．must be | D．might have been |
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——I can’t find my purse anywhere.
——You have lost it while shopping.| A．may | B．can | C． should | D．would |
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—___John come here tonight?
—I’m not sure, but he ______ stay at home.| A．May, might | B．Can, must | C．Must, might | D．Can, might |
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28. As far as I know, this man ____ risk anything than lose the ring for his wife.| A．would rather | B．had better | C．preferred | D．would like to |
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