The factory is polluting air. It must _______...

The factory is polluting air. It must ________．

A. close down　　 B. be closed down　　 C. pull down　　 D. be pulled down

九年级英语单选题困难题查看答案及解析

The factory is polluting the environment. The government want to ________．

A. knock down it　　 B. knock it down

C. put down it　　 D. put it down

九年级英语单选题中等难度题查看答案及解析

---___________ a big factory near the river. Where is it now?

--It has been closed because it polluted the air.

A. It used to be　　 B. There used to be

C. It is used to be　　 D. There is used to be

九年级英语单选题中等难度题查看答案及解析

The air pollution is serious, ________ we must try our best to reduce it.

A. so　　　　　　 B. or　　　　　　 C. if

九年级英语单项填空中等难度题查看答案及解析

Air pollution is becoming more and more serious, 　　　 actions must be taken to stop it.

A. so　　　　　　　　　　　　 B. but　　　　　　　　　　　　 C. or　　　　　　　　　　　　 D. until

九年级英语单项填空简单题查看答案及解析

Air pollution is becoming more and more serious, ________ action must be taken to stop it.

A. so　　 B. but　　 C. or　　 D. until

九年级英语单选题简单题查看答案及解析

—What are the _______ of bike riding?

— It can help cut down air pollution.

A. advantages　　 B. reasons　　 C. results　　 D. ideas

九年级英语单选题中等难度题查看答案及解析

Air pollution has become ____than ever before. We must do something to stop it.

A. the more serious　　　　　　　　　　 B. more serious

C. seriouser　　　　　　　　　　　　　 　 D. the most serious

九年级英语单项填空中等难度题查看答案及解析

Now the air in our town is __ than before.

Yes. Something must be done to stop the pollution.

A. even worse　 B. rather bad　　

C. very good　 D. much better　

九年级英语单项填空中等难度题查看答案及解析

–Why ______ we close that chemical factory?

–Because it has caused lots of pollution. We need better environment.

A. must

B. can

C. may

九年级英语单选题中等难度题查看答案及解析