Unit 4
VOCABULARY (page 32)
1 1. c 2. e 3. b 4.
a 5. d
2
1. activist 4.
treasure
2. auction 5.
freedom
3. wilderness 6.
in shock
3
1. often 4.
ignores
2. hadn’t 5.
I’m so glad
3. slow down
4
1. misbehave 5.
underpaid
2. overpopulated 6.
unspoilt
3. intercity 7.
disapprove
4. reuse
5
1. incomplete 5.
impolite
2. illegal 6.
underestimated
3. dishonest 7.
unbelievable
4. underdeveloped 8.
inactive
(page 33)
6
1. Waste,
landfill
2. wildlife,
deforestation
3. urbanisation,
smog
4. solar power,
renewable energy
7
1. water shortage
2. source
3. litter
4. Global warming
5. greenhouse
effect
6. fuel
8
1. activist 5. wilderness
2. solar-powered 6. face
3. deforestation 7. illegal
4. wildlife 8. convicted
Grammar(page 34)
1
1. would ride
2. hadn’t
protested
3. water
4. thought
5. will be
6. wouldn’t have
watched
7. posted
8. cost
2
1. had, would be
2. won’t get,
leave
3. had known,
might have attended
4. were, wouldn’t
throw
5. explains, will
talk
6. go, will
research
7. would have
enjoyed, had come
8. go out, take
3
1. I’ll lock the
door when I leave.
2. If she weren’t
underpaid, it would be a perfect job.
3. I wouldn’t
have served that last night if I had known.
4. Unless you get
enough sleep, you’ll be tired.
5. I’ll let you
know as soon as I decide.
4 1.
d 2. e 3. c 4. a 5. B
(page 35)
5
1. hadn’t taken 6.
have
2. might have
ended up 7. will discuss
3. were 8. would be
4. will happen 9. held
5. had thought 10. get
6
1. If people knew
the facts, they would be more worried about global warming.
2. We won’t finish our project on time unless we
work tonight.
3. If Laura
hadn’t lent me the book, I would have
bought my own copy.
4. When we get to
London, we’ll call you.
5. I didn’t
expect it to be sunny. I wish I had brought my sunglasses with me.
7
1. No habría tanto tráfico si la ciudad no
estuviera superpoblada.
2. Algunos países se enfrentarán a
problemas sociales serios a menos que la gente tenga / si la gente no tiene más
libertad.
3. Ojalá / Si al menos no hubiera tanta
niebla tóxica hoy.
4. (Él) Habría ido a prisión si hubiera
sido condenado por el robo.
5. El ayuntamiento / El municipio / La
municipalidad reconstruirá las casas en cuanto reciba un presupuesto.
8
1. had cheated 5. taken
2. would be 6. has been protected
3. is being given
7. had been sitting
4. will have
become 8. weren’t
skills (page
36)
1
1. mustn’t
2. didn’t want
3. £1.03 to 89p
4. buy a new one
later
5. we didn’t have
much to drink
6. the hurricane
7. rubbish
2
1. exploit 5. dispose of
2. damage 6. threaten
3. supply 7. pollute
4. cut down
3
1. What is it?
2. What does it
look like?
3. What is it
made of?
4. How does it
help the environment?
5. What else can
you tell me about it?
6. What are the
disadvantages?
7. Is it being
used yet?
writing (page
37)
1
1. Although
2. Unfortunately,
3. during
4. Obviously,
5. Consequently
2
1
extra reading
(page 38)
1 1. F 2. O
2 b
3
1. solar panels
and built-in wind turbines
2. by using
rainwater
4
1. T – “… Hearst
Tower … was built mainly with recycled steel.” “The Bank of America Tower … was
constructed with concrete that contained waste from metal production.”
2. F – “Nearly every green skyscraper collects rainwater for
use in cooling and heating systems, in bathrooms, to water plants and for
decorative fountains.”
5
1. requires 4. annually
2. completed 5. currently
3. generate
check
Progress (page 39)
1
1. Solar power, Renewable energy
2. faces, avoids
3. disposed of,
destroyed
4. urbanisation,
deforestation
2
1. replace 4. outspoken
2. litter 5. leaked
3. water shortage
6. Auction
3
1. court 5.
unexpected
2. wilderness 6.
unspoilt
3. activists 7.
cut down
4. illegal 8. dump
4 1. c 2. e 3. a 4. b 5. d
5
1. could drive, are
2. hadn’t had, takes place
3. would turn on, won’t do
4. had, finish
6
1. During
2. Unfortunately
3. Obviously
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