Sunday, January 23, 2011

answer key. units 3 and 4

UNIT 4. STUDENT´S BOOK



VOCABULARY The Environment
1
 1. False. The use of alternative energy will protect the environment.
2. True.

3. False. It is important to protect the environment.

4. True.

5. True.

6. False. People save water when they have a shower instead of a bath.

7. True.

8. False. It is possible to recycle plastic bottles.





2 POSSIBLE ANSWERS

1. Clean fuel produced from soya beans doesn’t harm the environment.

2. Everybody should care about environmental issues.

3. If we don’t protect the environment, we will damage our planet.

4. We shouldn’t destroy natural resources because we will need them in the future.

5. Exhaust fumes damage our lungs because they contain carbon monoxide.

6. The Fab Tree Hab will save a lot of energy.

7. Our country is going to increase the amount of water that we recycle every year.

8. Every family should recycle glass, paper and plastic.


BRITISH / AMERICAN ENGLISH


1. petrol – British; gas – American

2. garbage - American; rubbish – British

3. dustbin – British; trashcan – American

3 1. chemicals 4. conservation

2. rubbish 5. Pollutants

3. ecological disaster 6. Deforestation

PREFIXES

4 1. b 2. c 3. d 4. e 5. f 6. A


page 49


5
 1. recycle  2. international  3. overpopulated  4. anti-nuclear  5. underdeveloped


6
1. air pollution   5. save

2. global warming 6. damage

3. petrol 7. pollutants

4. environmentally-friendly

7
To be in a very difficult or dangerous situation.
1. water (the past is over and cannot be changed so there’s no point worrying about it)

2. wind (stop worrying and take a risk)

3. sun (a great number of things)

Bridge to Speaking
A POSSIBLE ANSWERS

1. This weekend, my friends and I are going scuba diving.

2. In the year 2015, I will still be living with my parents.

3. This time next Saturday morning, I will be playing on my console.

4. By this time next year, I will have got my licence.


B POSSIBLE ANSWERS
1. No, we don’t recycle any rubbish at all because my parents don’t actually care about recycling.

2. Yes, of course. Teenagers are really worried about the environment because we know that if we don’t protect the environment, we will destroy our planet and our kids will have nowhere to live.

3. The city council should ban private cars from driving into the city centre and everybody should use public transport.