题目内容
10.-Look!The man at the school gate _________ be our headmaster.He is always standing there to welcome us every morning.-No,it _______ be him.He is holding a meeting in the office now.( )
| A. | must; can't | B. | must; mustn't | C. | can't; mustn't |
分析 --看!学校门口的那个人一定是我们的校长,他每天早上都站在那儿欢迎我们.
--不,这不可能是他.他正在办公室开会.
解答 答案:A.考查情态动词.句意"--看!学校门口的那个人一定是我们的校长,他每天早上都站在那儿欢迎我们.--不,这不可能是他.他正在办公室开会.".第一个空,结合语境"他每天早上都站在那儿欢迎我们.",可知,应该用must肯定.第二个空,由"他正在办公室开会了",可知,表示否定推测用can't不可能,选A.
点评 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语.否定形式通常在后面加not.要注意情态动词的不同用法.
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