We know that we will pollute the environment if we do not use materials wisely. People have founded many programmes to save materials and protect the environment. 3Rs is one of them. 3Rs stands for Reduce, Reuse and Recycle. Reducing means we reduce the amount of waste we produce. This is the best way to help the environment. If we do not reduce the waste, we will pollute our environment more seriously. Reusing is using the items again. For example, plastic bags can be reused if it is still new. We should not throw away reusable things but store and use them for other purposes. Recycling is changing the waste materials into new products. For example, we recycle waste paper to make carton boxes. We should recycle as many things as possible. If we reduce, reuse and recycle our resources, we will save energy and money. Moreover, we will help to prevent pollution and global climate change.

1. What will happen if people do not use materials wisely? .....................................................................................................................

2. What does 3Rs stand for? .....................................................................................................................

3. What does "reducing" mean? .....................................................................................................................

4. What will happen if we do not reduce the waste? .....................................................................................................................

5. What is "reusing"? .....................................................................................................................

6. Should we throw away reusable things? .....................................................................................................................

7. What is "recycling"? .....................................................................................................................

8. Can we recycle waste paper to make a new product? .....................................................................................................................

28. Thousands of people donated money and food to those in _____

A. length

B. need

C. order

D. space

The Three Rs ______ reduce, reuse and recycle

Kien is not very ______. He never plays games.

Khi thả quả bóng cao su từ trên cao xuống, sau nhiều lần nảy lên độ cao của nó giảm dần. Vì năng lượng của quả bóng bị hao phí một phần thành nhiệt năng khi quả bóng đập vào đất, một phần truyền cho không khí làm cho các phần tử không khí chuyển động.

II. Complete the sencond sentences in each pair so that it means the same as the sentences before it.

1. You mustn't swim in that polluted lake, boys.

->Don't ______________________________

2. The Nile is the longest river in the world.

->No river _____________________________

3. We live near the school, but they don't

->They live _____________________________

4. This is my racket, but that one over there is his.

->That is ________________________________

5. Minh hopes to speak English well in 3 years.

->Minh hopes that ____________________

6. It was easy for this home robot to cook meals.

-> This home robot could ________________

7. Teacher robots can teach all subjects in the future.

-> Teacher robots will ______________

8. Doctor robots don't know how to do the houshold chores.

-> Doctor robot can't

9. I don't think robots will be able to play football like we do.

-> Robots won't ______________________________

10. Their frist robots weren't capable of talking to people.

->Their first robots couldn't ________________________

11. you should give some directions, or he won't understand you.

-> If you don't ________________________________

12. My brother was a fast runner when he was young.

-> My brother could _______________________

I. Write complete sentences of post ability (could) or future ability (will be able to)...

1. Someday,/I/make/ a robot/of my own.

-> ....................................................................

2. Peter's father/ drive/when /he/was/18 years old.

->......................................................................

3. Robots/play/with/children/in the near future.

->...........................................................................

4. She/ride/a bike/when/she/was/7 years old.

->................................................................

5. Smart phones/replace/laptops/very soon.

->..............................................................

6. Future robots/play music/ as humans do.

->............................................................

7. Last week,/I/not/eat/anything/because/I/was ill.

->..............................................................

8. in/today/Robots/intelligent/are/than/more/those/the past.

->.....................................................................

9. already/many/tasks/ Robots/ do/can/humans/done

->.................................................................

10. can/ pronunciation/help/their/English/children/Teaching robots/ im prove.

->.......................................................