Task 1
1. B
2. A
3. D

Task 2

A.
1. T
2. F
3. F

B.
1. D
2. C
3. C

C. skip

Task 3
I. the country; trees, grass, lakes, and streams
II. concrete, iron, and steel; take in the heat during the day and throw off heat into the air at night, warmer winters, car engines, electrical appliances
III. air pollution may stop sunlight from reaching the earth; ice near the North and South poles to melt; to be slowly flooded and people living in these cities to move to higher land

Tasks 4 and 5 skip

Task 6
A.
1. F
2. T
3. F
4. T
5. F
6. T
B. skip

Task 7 matching

A and B skip

C. Southeast England:26…; Southern Scotland:Maximum…; Brighton:15…;
Midlands:23…; Northwest of Scotland:Light…; Spain:34…; Greece:32…;
France:Cloudy with rain…; Northern Ireland:Heavy…; Most of England:Cloudy but mainly…
Task 8
Air Pressure: fall, fall, rise, rise, rise, fall
Causes: The dust particles begin to settle to the ground in thinner air and the air clears; instead of traveling upward and outward into the atmosphere they are bend back to the earth and their range extended; the methane is trapped in the bottom of the swamp because of the thick air; birds prefer to fly where the air is the densest and they can get greater lift with their wings; smoke rises with thicker air; the gas in our bodies expands in lower air pressure

Task 9

A. skip
B. f,c,a,d,b,e
C. skip
D. .
1. D
2. B
Task 10

Undoubtedly, Tibet is one of the harshest places for human existence. It is cool in summer but freezing cold in winter. In Lhasa, the mildest city in Tibet, temperatures may exceed 29 degrees Celsius in summer while plummeting to -16 degrees Celsius in winter! Sun radiation is extremely strong in Tibet. The sunlight in Lhasa is so intense that the city is called Sunlight City.