一、词汇运用
1. Can you be ____________（严肃的）for once? This is important for everyone.
2. The teacher says we can ____________（回收利用）waste to protect our environment.
3. It’s ____________（明智的）to check your bag after you get on the train.
4. The heavy rain will ____________（引起）many big problems.
5. The costs were ____________（减少）by 20% last year and it was a great success.
6. It looked funny while they were ____________（挖）me out from the snow.

一、1. serious 2. recycle 3. wise 4. cause 5. reduced 6. digging

( )1. — It’s said that many trees are cut down because we’re in bad need of paper.
— That’s why we should try to ________ all our waste paper.
A. recycle B. protect C. produce D. reduce

二、1-5 ACBDA 6-7 CD

( )2. The heavy rain ________ so many traffic accidents on the highway last Monday.
A. made B. allowed C. caused D. let

二、1-5 ACBDA 6-7 CD

( )3. The computers ________ in the classroom next month.
A. is going to use B. will be used C. use D. have used

二、1-5 ACBDA 6-7 CD

( )4. Too much water ________ in our school every day. It’s a serious problem.
A. has wasted B. have wasted C. was wasting D. is wasted

二、1-5 ACBDA 6-7 CD

( )5. Remember ________ the magazine to Sandy after ________ it.
A. to return; reading B. returning; reading
C. to return; read D. returning; reads

二、1-5 ACBDA 6-7 CD

( )6. — Kate, don’t forget to________ the light when you leave the room.
— OK, Mom.
A. cut off B. put off C. turn off D. take off

二、1-5 ACBDA 6-7 CD

( )7. — I’m thinking about giving up my job, Andy.
— ________ It’s well - paid and you’d better think twice.
A. Guess what? B. Sounds great! C. Never mind. D. Are you serious?

二、1-5 ACBDA 6-7 CD

三、还原信息
Pollution is one of the biggest problems in the world today. In many places, rubbish is thrown into lakes and rivers. Because of this, these places have already been polluted.
In some cities, the air is filled with pollution. 1.________ If it is not cleaned up, more people will be ill.
2.________ Land and water pollution puts many animals in danger. It even kills many animals every year. If we do not act to improve the environment, more living things will be killed by pollution.
3.________ We should separate rubbish into different groups. In this way, it can be recycled and reused. We had better plant more trees. Trees play an important part in protecting our environment 4.________ What’s more, we shouldn’t put the waste into lakes or rivers. If we don’t take action, we may run out of potable（可饮用的）water some day.
If we can do these, we will make the world a better place to live in.
A. This makes some old people and children ill.
B. Not only people but animals are harmed by pollution.
C. We can make our lakes and rivers cleaner and cleaner.
D. It’s time for all of us to take action right away!
E. They reduce dust and help keep the air clean.
F. A few of us should take action to protect the environment.

三、1-4 ABDE