There are many kinds of pollution. Air, water, and land can be polluted. Some pollution is caused by nature, such as floods, forest fires, and volcanoes. People are the major cause of pollution. We pollute the air with our cars, homes, and factories. Smoke from factories and car exhaust makes the air looks gray and smoggy. Some people cannot go outside when the air is very bad! We pollute the water by dumping garbage and chemicals in the water. Plants and animals die because of the pollution in the water. We pollute the soil with chemicals and garbage. We harm the land by cutting down trees in the forest, especially to build roads and new houses without careful planning and thinking.

     The only way to save our environment is to think about pollution. How can you stop or limit pollution? How do we protect our environment? Conservation is one way to protect our environment. Conservation is the wise use and protection of our environment. We can control water pollution by not producing as much waste and by proper disposal of sewage and garbage. We can take care of recreation land by cleaning up after ourselves and not causing more pollution. Carpooling and public transportation will help reduce air pollution.

     Recycling is a type of conservation. Recycling is reusing items over again or in a new way. Recycling can help US conserve our natural resources so they will last many more years.

A. Find the word in bold in the passage that means:

1. the protection of the natural environment                                       …………..

2. have a bad effect on something                                                       …………..

3. a large amount of water covering an area that is usually dry          …………..

4. sharing a car ride with other people                                                …………..

5. waste gases that come out of an engine                                          …………..

6. the process of making air, water, soil, etc. dirty                             …………..

7. get rid of                                                                                  …………..

Finish the second sentence so that it has a similar meaning to the fĩrst beginning with the given words.

1. He wanted to know whether I understood what she meant.

     He said: “Do ……………………………………………………………….?

2. Please don’t touch the things on display.

     Would you mind ……………………………………………………………?           

3. You can’t smoke anywhere in the hospital.

     Smoking is …………………………………………………………………...

4. Taking notes in shorthand during lectures can help you keep up your shorthand ability.

     You can ……………………………………………………………………….

5. “Won't you forget to feed the goldfish?” said Mary.

     Mary reminded ……………………………………………………………….

1. This summer resort is absolutely wonderful and I’d ………. it to anyone.

A. recommend                        B. talk                          C. accommodate                    D. praise         

2. We had to walk since we couldn’t ………… to take a bus.

A afford                       B. be wealthy              C. supply                                 D. furnish

3. Our life would be very difficult without ………..

A. luxury furniture       B. water                       C. saving-labor machines       D. electricity

4. After retiring, my aunt spent her ……… on an expensive holiday.

A. dollars                     B. accounts                 C. savings                               D. cheques

5. A lot of people left school at 16 and they now .................... leaving so early.

A. sorry                       B. regret                      C. confuse                              D. worry

6. Remember ............. the door before going to bed.

A. locking                    B. to lock                     C. locked                                 D. not locking

7. Nancy talks as if she ............... everything.

A. knows                     B. had known              C. knew                                   D. not know

8. Many things which we can do now couldn't .............. years ago.

A. do                            B. done                        C. being done                          D. be done

9. When I first visited Moscow, I couldn't get used ............... the cold weather.

A. with                         B. to                             C. for                                       D. in

10. They insisted she ................ the party.

A. attended                  B. attends                    C. to attend                             D. attend

11. We can’t go wrong if we…….. the instructions.

A. follow                      B. take                         C. guide                                   D. keep

12. Some of my friends are taking extra classes in English ...................... become tourist guides. 

A. so that                     B. so as                       C. in order that                        D. so as to

13. Michael and his friend were badly injured in the last match, so………can play today.

A. both of them           B. either one of them  C. neither of them                   D. not any of them

14. Mary put a ………. on the letter.

A. five-cents stamp     B. five-cent stamp      C. stamp of five cents            D. five-cent stamps

15. We quarreled ………..the choice of a house.

A. on                            B. over                                    C. for                                       D. to

16. There are a lot of people at my friend's wedding party, only a few of ………. I had met before.

A. who                         B. whose                     C. whom                                 D. which

17. You should have known that Anne could not keep a secret. Never again ..................... her anything.

A. will tell                     B. will I tell                   C. I tell                                     D. I will tell

Cho hình vuông ABCD có cạnh là 12cm. M là trung điểm của AB. N là điểm nằm trên cạnh AD sao cho AN= 2/3 AD. Tính S△MCN.

Cho hình vẽ: Tam giác ABC vuông tại A có diện tích bằng 36cm2 . D là trung điểm AB ; E là trung điểm của BC . Diện tích tứ giác ADFC là

A. 18cm2 B. 24cm2 C. 36cm2 D.30cm2