Their answers are exactly the same. One of them ___ from the other.

A．must copy B．must have copied C．should copy D．should have copied

B

解析試題分析：句意：他們的答案一模一樣，一個人一定是抄襲另外一個人的。根據(jù)句意是對過去的情況的肯定推測，首先排除AC，因為它們是表示現(xiàn)在情況，must have done過去一定做了，should have done過去本應該做而沒做，選B。
考點：考查情態(tài)動詞的完成式

練習冊系列答案
相關習題

科目：高中英語 來源： 題型：單選題

—Oh, my God！Our teacher is so mean!
—Calm down, my friend.Even though she is tough  sometimes, she ________ be nice if you really work hard.

A．must　B．should
C．can　D．shall

查看答案和解析>>

科目：高中英語 來源： 題型：單選題

—Isn’t Ann’s husband over there?
—No, it _____ be him — I’m sure he doesn’t wear glasses.

A．can’t B．must not C．won’t D．may not 

查看答案和解析>>

科目：高中英語 來源： 題型：單選題

—Will you read me a story, Mummy?
—OK. You ________ have one if you go to bed as soon as possible.

A．mightB．shallC．mustD．could

查看答案和解析>>

科目：高中英語 來源： 題型：單選題

—Could I surf the Internet for twenty more minutes, Mum?
—Oh, dear, if you________.

A．mustB．canC．mayD．should

查看答案和解析>>

科目：高中英語 來源： 題型：單選題

—Did you ask Tom for help?
—I ________. —I managed perfectly well on my own.

A．needn’t haveB．don’t need to C．didn’t need toD．needn’t

查看答案和解析>>

科目：高中英語 來源： 題型：單選題

—I wonder why Susan looks worried today.
—I’m not sure, but she _____a small accident driving here.

A．could have B．might have C．might have had D．must have had

查看答案和解析>>

科目：高中英語 來源： 題型：單選題

So many people violate traffic regulations that we ____ put too much emphasis on the importance of traffic safety.

A．must not B．should not C．need not D．cannot

查看答案和解析>>

科目：高中英語 來源： 題型：單選題

It is hard to say what kind of person he is．Sometimes he is very friendly; at other times he ___ be very cold．

A．canB．mustC．willD．shall

查看答案和解析>>

同步練習冊答案