Cars play an important role in modem life, but they       also cause many problems like air pollution.
A．shouldB．canC．mustD．will
B
考查情態(tài)動詞。句意：小汽車在現(xiàn)代生活中起著重要的作用，但它們也可能引起像污染等許多問題。故用情態(tài)動詞can，選B。
練習冊系列答案
相關習題

科目：高中英語 來源：不詳 題型：單選題

—How did your mathematics exam go？
—I thought I           ，but in fact I fell behind in the class.
A．should have been the top 10B．could have been the top 10
C．may have been the top 10D．need have been the top 10

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

It is unfair that such a nice person like Jane ______ lose her job. She works so hard!
A．canB．mayC．shouldD．shall

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

—Are you in a hurry?
—No, in fact I’ve got plenty of time. I_______wait.
A．mustB．canC．needD．should

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

– Mary was crying sadly.
-- Oh, she ________ the bad news that her mother was badly injured in the accident.
A．must knowB．might have knownC．must have knownD．should have known

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

What would have happened ______as far as the river bank ?
A．Bob had walked fartherB．if Bob should walk farther
C．had Bob walked fartherD．if Bob walked farther

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Tom insisted that what he said _____ true, and insisted that he _____ punished.
A．be; should not beB．was; not beC．was; was notD．should be; not be

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

He is an hour late by now．He         last night．
A．must stay upB．should stay up
C．should have stayed up D．must have stayed up

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

---Hi, Lucy．Have you heard of any good news about Frank recently?
---Yeah．She ____ have done better．She has been admitted to one of the top-ten universities in the States．
A．shouldn’tB．wouldn’tC．needn’tD．couldn’t

查看答案和解析>>

同步練習冊答案