题目内容
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
解析试题分析：句意：他们的答案一模一样，一个人一定是抄袭另外一个人的。根据句意是对过去的情况的肯定推测，首先排除AC，因为它们是表示现在情况，must have done过去一定做了，should have done过去本应该做而没做，选B。
考点：考查情态动词的完成式
—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 |
—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 |
—Will you read me a story, Mummy?
—OK. You ________ have one if you go to bed as soon as possible.
| A．might | B．shall | C．must | D．could |
—Could I surf the Internet for twenty more minutes, Mum?
—Oh, dear, if you________.
| A．must | B．can | C．may | D．should |
—Did you ask Tom for help?
—I ________. —I managed perfectly well on my own.
| A．needn’t have | B．don’t need to | C．didn’t need to | D．needn’t |
—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 |
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 |