1. If people can................... wastes, they will save a lot of money.

A. rebuild B. reduce C. reuse D. use

2. In the future, we won't go on holiday to the beach but we............ go on holiday to the Moon.

A. must B.can't C. might D. won't

3............the air is cleaner; people will have less breathing problems.

A. Unless B. When C. If D. Because

4. I might have a smartphone....................... the Internet.

A. surf B. surfing C. to surf D. to surfing

5. '' What can we do ......... air pollution?

A. reducing B. to reduce C. reduce D. to reducing

Rearrange the words and phrases to make meaningful sentences.
1. when / turn off / don't / you / them / the lights / use
=>.................................................................
2. students / greener place / if / the school yard / will / plant / in / a / more trees / their school / be
=>.................................................................
3. the air / will have / if / we / have / breathing problems / cleaner / is / less
=>.................................................................
4. children / able to / robots / help / do / teaching / will / their homework / be
=>.................................................................
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Choose the letter A, B, C or D to answer these following questions

People need to breathe. If they don’t breathe, they will die. But how clean is the air people breathe? If they breathe dirty air, they will have breathing problems. Plants and animals need fresh air too. A lot of the things in our lives create harmful gases and make the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.

Question: What is the harm of people when they breathe dirty air?

A. They will suffer diseases related to breathing.

B. They have no problem.

C. The environment is polluted

D. Many animals and plants will die.

II. Choose the correct answer A, B, C or D to complete the passage. 

People need to breathe. If they don’t breathe, they (1) ____________ die. But how clean is the air people breathe? If they breathe (2) ___________ air, they will have breathing problems. Plants and animals need (3) __________ air too. A lot of the things in our lives create harmful gases and (4) _________the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer. 

1. A. won’t B. are C. must D. will

2. A. clean B. fresh C. dirty D. cleaner

3. A. clean B. safe C. dirty D. polluted

4. A. make B. get C. give D. made

III. Choose the correct answer A, B, C or D to complete the passage.

People need to breathe. If they don’t breathe, they (1) ____________ die. But how clean is the air people breathe? If they breathe (2) ___________ air, they will have breathing problems. Plants and animals need (3) __________ air too. A lot of the things in our lives create harmful gases and (4) _________the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.

1. A. won’t                              B. are                           C. must                        D. will

2. A. clean                               B. fresh                       C. dirty                        D. cleaner

3. A. clean                               B. safe                         C. dirty                        D. polluted

4. A. make                               B. get                          C. give                         D. made

IV. Read the text. Choose the best answer A, B, C or D Many pupils of our school have (1)______hobbies. Lara is 11 years old. She likes (2)_________ poems and painting pictures. Tom is 15 years old ans he has very interesting hobbies. He likes dancing, designing Internet sites and (3)_________ the piano. Robert is almost 13 years old. His hobbies are playing football and (4)________ detective stories. Our pupils do many interesting things and they are very busy. They also love different (5)_______. Tom is the best pupil at Maths. Lara is good at Arts and Literature. And Robert is one of the best pupils at PE. Their hobbies help them study well too.

1.A. different              B. differ                                  C. difference                           D. differed

2.A. write                    B. writes                                  C. writing                                D. wrote

3.A. playing                B. play                                     C. plays                                   D. to play

4.A. read                     B. reads                                   C. to read                                D. reading

5.A. objects                 B. sports                                  C. subjects                               D. hobbies

II. Choose the correct answer A, B, C or D to complete the passage.

People need to breathe. If they don’t breathe, they (1) ____________ die. But how clean is the air people breathe? If they breathe (2) ___________ air, they will have breathing problems. Plants and animals need (3) __________ air too. A lot of the things in our lives create harmful gases and (4) _________the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.

1. A. must B. are C. will D. won’t

2. A. fresh B. clean C. cleaner D. dirty

3. A. clean B. safe C. dirty D. polluted

4. A. get B. make C. give D. made

1. The air in John's area is polluted , so he has breathing problem. ( if / because / because of / make / lead )

2. The soil is posoned because farmers use too many pesticides and herbicides . ( so ) - If farmer ..................

3. Turn off all the lights and you will not pay more money - If you .............. / Unless .........................

4. Be careful or you may have an accident - If ......................... / Unless .............................

5. He can't understand what she has said because he doesn't know English . ( If / so / because of )

6. Many people have stomachache due to the contaminated food ( because / so / if )

7. There is sewage in the lake , so the aquatic animals die . ( because / result / due to / make if )

Choose the letter A, B, C or D to answer these following questions

People need to breathe. If they don’t breathe, they will die. But how clean is the air people breathe? If they breathe dirty air, they will have breathing problems. Plants and animals need fresh air too. A lot of the things in our lives create harmful gases and make the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.

Question: What will happen if people don’t breathe?

A. They will have troubles in breathing.

B. They can’t speak.

C. They will die.

D. They aren’t able to move