2020年公共英语一级单项选择练习题（17）

　　1. The light is still on, so he _____ be at home.A. must

　　B. might

　　C. could

　　D. can't

　　2. My brother doesn't like the volleyball, so the volleyball _____ be his.

　　A. must

　　B. might

　　C. can't

　　D. could

　　3. The guitar _____ be your sister's. Only she in your family plays the guitar.

　　A. must

　　B. might

　　C. could

　　D. can't

　　4. The red CD player _____ Jim. He likes CD very much.

　　A. must belong to

　　B. can belong with

　　C. might belong on

　　D. must belong from

　　5. My mother _____ in your school, because she has gone to America already.

　　A. must be

　　B. can't be

　　C. should be

　　D. may be

　　6. It is usually warm in my hometown in March, but it _____ be rather cold

　　sometimes.

　　A. must

　　B. canC. should

　　D. would

　　7. You _____ play with fire, it is very dangerous.

　　A. needn't

　　B. may not

　　C. mustn't

　　D. wouldn't

　　8. Your parents say that you _____ watch TV all the evening if you wish.

　　A. may

　　B. must

　　C. can

　　D. might

　　9. You _____ careful with the fire when you have a picnic in the forest. It's too

　　dangerous.

　　A. will be

　　B. must be

　　C. can be

　　D. may be

　　Your father often _____ English in his _____.

　　A. study; study

　　B. studies; studies

　　C. study; studies

　　D. studies; study

　　【答案】

　　1. A 在肯定句中表示把握性比较大的推测用must be(想必是)。

　　2. C 在否定句中表示把握性比较大的推测用can't be(不可能)。

　　3. A 从后面句子的情景判断“想必是她的”，在肯定句中表示把握性比较大的推测用must be。

　　4. A 从后面的句子“他非常喜欢CD”可以判断用must belong to表示“想必是属于他的”。

　　5. B 从后面句子的情景判断“不可能在你们学校”，在否定句中用can't be表示“不可能”。

　　6. B can表示肯定的推测。

　　7. C 用mustn't表示“不准，禁止”。

　　8. A may表示“许可”。9. B 此处must表示“必须”，must be careful表示“必须小心”。

　　9. B 此处must表示“必须”，must be careful表示“必须小心”。

　　10.D study既可以是动词也可以是名词，从本句判断第一空用动词表示“学习，研究”，根据主语用第三人称单数;第二空是名词，表示“书房”。