Question 10: People have delivered food and medical supplies since yesterday.

à Food and medical supplies ______________________________________________

Question 11: It rained heavily, so we canceled the flight to Ha Noi.

à Because it ___________________________________________________________

Question 12: Lan said, “ I want to become a fashion designer”.

à Lan said she__________________________________________________________

Although the world’s energy resources have taken many millions of years to produce, we are quickly beginning to…..(1) These supplies. Recently a UN committee reported that the world’s oil and gas supplies would last about 100 years if used carefully. The report stated that…..(2)….. would be enough oil and gas for a century only if the present demand could be controlled. If the demand continued to ..(3)…., the report said that fuel supplies would…..(4)….for less than forty years. According to the report, governments must now take steps to control the amounts of fossil fuel which are used.

It is generally accepted, and not only by (1. environment) _________, that there is an urgent need for clean energy sources to replace the world’s diminishing supplies of oil and coal, and to bring about a (2. reduce)_________ in the amount of (3. harm) __________ emissions from power stations. Although solar power which relies on energy from direct (4. sun)_________ is popular in homes as a means of heating water, the most common form of (5.alternate) __________energy is wind power. Modern wind farms, (6. site)_________in the windy areas of the country like Cornwall, consist of modern turbines, which vaguely resemble the old-fashioned (7. wind) _______ that harnessed the power of the wind to grind wheat.

Supporters of wind power are (8. optimism)_________ about the future, saying that wind farms could soon provide 10% of Britain’s energy. It is also less (9. cost) _________ to build a new wind farm than a new coal-fired power station. It is worth remembering that energy (10. conserve) _______ makes sense, as whatever the source, it is cheaper to save energy than to generate it.

In Britain, natural gas is the most popular fuel for heating homes, and for cooking. It is piped all over the country from the gas fields below the North sea. Natural gas is used chiefly as a direct source of energy, although it is also used in the chemical industry. At the moment, the supply is plentiful, but it will be running short by the end of the century, and it will run out during the 21st century unless new supplies are found. We could do without natural gas, as coal gas can be used as a substitute, and there should be enough coal to last for several centuries. However, it is a form of energy which is not only cheap, but also highly efficient.

Questions

1. Where does natural gas come from?

2. When will it run out?

3. Is it efficient?

4. What can be used as a substitute for natural gas?