4. Decide whether the following statements are true or false according to the text.

1. Water covers more than 70 % of the earth's surface.

2. Water is in the air we breathe.

3. We can’t exist without water.

4. Most scientists don’t believe that life itself began in the salty water of the sea.

5. Water influences the earth's climate.

6. Land absorbs and releases heat from the sun slowly.

7. People irrigate dry farm lands to grow more food.

8. 2.5% of the water supply on Earth is saltwater and 97.5% of it is fresh water.

9. Most of fresh water is easily available to people.

10. Rains fall evenly over the earth.

11. The cities and factories pollute water.

5. Answer the following questions.

1. Why is water the most common substance on earth?

2. Does every living thing consist mostly of water?

3. Why do breezes from the oceans bring warmth to the land in winter?

4. Where have great civilizations risen?

5. What do we use water in our homes for?

6. Is water used up?

7. Have any regions a water shortage?

8. Why do some regions have a water shortage?

9. Should we learn more about water? Why?

6. Read the text again and make the plan of it.

7. Choose the best abstract for the text.

1. This article tells us broadly about water. It discusses water’s importance to civilization and to life itself. It describes the nature of water.

2. This article comments broadly about water problems. It discusses how we use and abuse our water supply.

3. T his article deals with water supply on the Earth. It discusses the problems of water pollution and water usage. It also describes the properties of water.

8. Match the words with their synonyms.

1) substance	6) destruction	a) fresh	f) contaminate
2) shape	7) constantly	b) stock	g) abundant
3) supply	8) unsalty	c) shore	h) material
4) plentiful	9) shortage	d) deficit	i) always
5) bank	10) pollute	e) form	j) devastation

9. Match the words with their opposites.

1) salty	6) dry	a) wet	f) fresh
2) hot	7) slave	b) cold	g) master
3) absorb	8) pollute	c) clean	h) dissipate
4) quickly	9) increase	d) slowly	i) decrease
5) warm	10) demand	e) supply	j) cool

10. Fill in the correct prepositions then choose any five items and make sentences.

1) to consist … sth.; 2) to wash soil … rivers; 3) to pound … the shores; 4) to carry … wastes; 5) to build … sth.; 6) to release heat … the sun; 7) to bring warmth … the land; 8) to spread … a land; 9) to use water … our homes … cleaning; 10) demand … sth.; 11) to be locked … icecaps; 12) to find way … the oceans; 13) to fall back … the earth … rain; 14) to dump wastes … the lakes and rivers; 15) to look … new sources of water.