VIII. Complete the sentences with the verbs in brackets. Use conditional sentences type 2.

1. If people________ (not be) so careless, Earth wouldn’t be in danger.

2. The amount of waste ________ (decrease) if people started to buy reusable packages.

3. Many fish wouldn’t die if factories________ (not dump) so many Chemicals into rivers and oceans.

4. If people stopped using cars completely, there________ (be) much less pollution.

5. If people________ (buy) more recycled paper, there wouldn’t be so much waste.

6. If we________ (not bury) Chemical waste underground, we ________ (not pollute) fresh water supplies.

7. Pollution________ (not be) such an issue if governments and common people really ________ (care).

8. What ________ (happen) if the whole world________ (be) full of pollution?

9. If people________ (pay) a little more attention to the environment, the Earth________ (be) greener.

10. If people no longer________ (pollute) the atmosphere, the air________ (soon become) clean again.

IX. Write conditional sentences type 2, using the cues given.

1. The river water is severely polluted, mostly________ the dumping of raw sewage.

A. due to    B. lead to    C. because    D. so

2. Sudden changes in water temperature can ________ mass killings of fish, plants, or amphibians.

A. come up       B. result in    C. dump into       D. thank to

3. Water pollution________ the death of all forms of life in the water bodies.

A. occurs       B. results of       C. creates       D. leads to

4. ________ plastic takes so long to break down, it pollutes the land and ocean.

A. Because       B. Due to         C. Even if          D. Although

5. Many flights were cancelled ________ the smoke from forest fires.

A. so        B. because           C. because of         D. result in

6. ________the garbage dump smells terrible, no one lives around there.

A. Because of          B. As         C. As a result of        D. Even though

7. ________the grain consumption is rising, forests will be cut to provide more room for planting crops.

A. since           B. Although          C. unless        D. Due to

8. Grace didn’t love nature, ________ she wasn’t happy when her group went camping in a jungle.

A. but         B. and        C. because        D. so

9. Thousands of fish were killed ________ a discharge of poisonous Chemicals from a nearby factory.

A. because         B. lead to        C. result in       D. as a result of

10. ________the fog, there were no take-oils from the airport yesterday.

A. Since        B. Because         C. Owing to          D. Thanks to

aquatic     radioactive      contaminated       poison      pollutant      dumped sewage     untreated       dead        effects

1. ________ or wastewater should be treated before it is discharged into the river or ocean.

2. More and more waste and________ are poured into the water, the soil and the air.

3. The________ material is stored in a special radiation-proof Container.

4. Oil spills can cause the death of________ animals such as fish.

5. ________sewage can spread disease and contaminate drinking water sources.

6. Cholera is transmitted through________ water

7. The health________ of air pollution include heart disease, lung cancer, and asthma.

8. Carbon dioxide is a dangerous air________.

9. Over 150,000 tonnes of waste are________ annually along the coastline.

10. Up to 100.000 fish were found________ along the river last week.

II. Complete the sentences with the words or phrases in part I.

1. The smoke from planes, cars and factories causes________.

2. There are many causes of________ including nuclear explosions, nuclear accidents and nuclear waste.

3. ________ can cause hearing loss and tinnitus.

4. ________can be caused by unattractive views, such as power lines, billboards, Street banners, open storage of trash, ugly buildings, etc.

5. ________can lead to the death of aquatic plants and animals.

6. ________can happen when the temperature of a body of water increases;

7. There’s just so much ________from the ground that we simply can’t see most of the stars.

8. The ever-increasing use of Chemicals such as pesticides and fertilizers is one of the main factors causing________.

Cho tam giác ABC vuông tại A có AH là đường cao. Từ H vẽ HD vuông góc với cạnh AB tại D, vẽ hE vuông góc với cạnh AC tại E. Biết AB = 15cm, BC = 25cm.

1)Tính độ dài cạnh AC và diện tích tam giác ABC.

2)Chứng minh tứ giác ADHE là hình chữ nhật.

3)Trên tia đối của AC lấy điểm F sao cho AF = AE. Chứng minh tứ giác AFDH là hình bình hành.

4)Gọi K là điểm đối xứng của B qua A, gọi M là trung điểm của AH. Chứng minh CM vuông góc HK.