—The meeting ___________ because of the smog in Northern China last week.
— Oh, it’s too bad! We should take action to improve the air quality.
| A．put out | B．was put out |
| C．put off | D．was put off |
— I hope there _______ less pressure on us today.
— If so, we _______ enjoy a more pleasant life.
| A．is; can | B．will be; can |
| C．will be; should | D．is; should |
Here is my phone number. You ______ call me anytime you like.
| A．must | B．can |
| C．should | D．need |
–The manager says that there’s no hot water after8:00 tonight.
–You mean we ______ go to bed without a shower. How terrible!
A. can B. have to C. may
The girl in the classroom ______ be Maria. She called me from the library just now.
| A．mustn't | B．may not |
| C．can't | D．needn't |
All passengers______go through safety check before they take a plane.
| A．can | B．may |
| C．must | D．ought |
Three bridges ________ over the river five years ago.
| A．built | B．build |
| C．were built | D．are built |
When Tim ___ why he was late for school, he just kept silent.
| A．was asked | B．asked |
| C．was asking | D．is asked |
The pet dog is warm and loving, It ______ as a daughter of my family.
| A．treats | B．treated |
| C．is treated | D．was treated |
I ______ follow you. Would you please repeat it?
| A．can’t | B．mustn’t |
| C．needn’t | D．shouldn’t |
—Must I water the flowers now? —No, you ________ . You __________ do it later.
| A．mustn’t, must | B．mustn’t, may |
| C．needn’t, may | D．needn’t, must |
--Wow! You have a ticket to the Expo!
--lt - by my uncle. He is working in Shanghai.
| A．has bought | B．had bought |
| C．is bought | D．was bought |
-Must I do my homework now? -No, you _ _. You may have a rest.
| A．mustn't | B．needn't |
| C．can't | D．wouldn't |
一Climate change________mainly by too much CO 2 in the air．
一So I think the key is to produce electricity without creating CO2
A．is caused B．caused C．causes
Computers are very useful in our lives, but they must properly.
A. use B. be using C. be used
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