题目内容
It __ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
| A．may | B．couldn’t | C．should | D．needn’t |
B
解析试题分析：句意：因为你知道很多单词，不可能是词汇量导致你练习中的问题。从because you know a lot of words.可知是用couldn’t，表示否定的推测“不可能”，may“可能，可以”，should“应该”，need’t “不必”，都不符合句意。选B。
考点：考查情态动词
名校课堂系列答案My sister met him in the hospital yesterday afternoon, so he _________ your lecture.
| A． couldn’t have attended | B． needn’t have attended |
| C． mustn’t have attended | D． shouldn’t have attended |
The first snow of every year is always so exciting, but too much snow _________ cause trouble
| A．shall | B．need | C．can | D．must |
You ________ in person; a telephone would have been enough.
| A．couldn’t have come | B．needn’t have come |
| C．shouldn’t have come | D．mustn’t have come |
— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.
— Oh, it ____ my younger sister. She was in my room at that moment.
| A．must have been | B．should have been | C．could have been | D．may have been |
He ______ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
| A．wouldn’t | B．shouldn’t | C．couldn’t | D．mustn’t |
—The similarities between social networks are striking.
—That ________ come as no surprise，because they are all products of the Internet.
| A．should | B．shall | C．may | D．must |
— Guess what! I have won the first prize in the speaking competition.
— Congratulations! You _____ put a lot of work into it.
| A．should | B．must | C．should have | D．must have |
It’s funny that Howard___ speak to you like your boss.
| A．might | B．would | C．should | D．must |