BT: Cho ΔABC có góc A = 60^o có phân giác BD và CE. Biết rằng BC = 4cm. Tính BE + CD

XX. Read the text then circle the best answer.

Many people still believe that natural resources will never be used up.Actually,the worlds energy resources are limited.Nobody knows exactly how much fuel is left. However, we should use them economically and try to find alternative sources of power. According to Professor Marvin Burnham of the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.

However, many people don't approve of using nuclear power because it is very dangerous. What would happen if there were a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations. The most effective thing is that we should use natural resources as economically as possible.

1. According to the passage, using nuclear power is...............

A. dangerous B. interesting C. safe D. cheap

2. Radioactivity from nuclear power.................

A. is harmless

B. alters a new kind of energy

C. is necessary to cure diseases

D. causes cances and may badly affect the future generations

3. How much fuel is left?

A. No one knows exactly B. Let' s use it as much as we would like

C. There is a lot of fuel D. It will never be used up

4. We should use coal, oil and gas...............

A. carelessly B. as economically as possible

C. as much as possible D. all are incorrect

XVII. Write comparative forms, using the given words.

1. She/ have/ few/ friend/ Victor.

-................................................................

2. He/ have/ more/ patience/ Polly.

-..................................................................

XVIII. Rewrite the sentences so that it stnys the same menning.

1. It wasn' t very cold although it was snowy.

→In spite of .....................................................

2. How far is it from your house to the nearest station?

→ What is......................................................?

XIX. Give the correct form of the word in the brackets.

1. We will reduce our use of ................ to save our energy. ( ELECTRIC)

2. My village is very quiet and ....................(PEACE)

XV. Read the passage and answer the question.

A carbon footprint is the amount of carbon dioxide (CO₂) released into the air by your own energy needs. You need transportation, electricity, food, clothing, and other goods. CO₂ is produced by the burning of fossil fuels which is used to provide energy for your homes, by the cars you travel in and by the manufacture and transport of goods you buy.

Carbon dioxide is also called greenhouse gas, which causes global warming. That is the reason why the carbon footprint is a very poweful tool to understand the impact of personal behaviours on global warming. If you want to contribute to stop global warming, the reduction of your personal carbon footprint is essential. Fist, you can reduce your carbon footprint by driving less. When possible, walk or ride a bike to avoid carbon emissions completely or use public transport in order to decrease CO emissions. Second, support using clean energy sources such as wind, solar, geothermal energy and biogas. Finally, reusing or recycling items you no longer use is also a good way to reduce your carbon footprint.

1. What is a carbon footprint?

..............................................................................

2. How is CO₂ produced?

..............................................................................

3. What can carbon footprint cause?

.................................................................................

4. What should you do to stop global warming?

..................................................................................

XVI. Read the passage and choose the best answer A, B, C or D to complete the passage.

In many countries in process of industrialization, overcrowded citis present a major problem. The (1) ............ of town is mainly caused by the drift of large numbers of people from the rural areas. The only long-tẻm solution is to make (2)............. in the rural areas more attractive, which would (3)............ people to stay there. This could be achieved by providing incentives for people to go and work in the villages. Moreover, facilities in the rural areas, such as transportation, health and education services should be (4)...........

1. A. population B. popularity C. populous D. overpopulation

2. A. life B. surroundings C. atmosphere D. sights

3. A. insist B. suggest C. encourage D. persuade

4. A. invested B. improved C. impressed D. increased