ANSWER KEY. UNIT 4

STUDENT'S BOOK

Page 53
Exercise 1:
1. chemicals
2. travel agent
3. competitive
4. destroy
5. overpopulated
6. deforestation
7. rubbish
8. scored a goal

Exercise 2:
1. save
2. keep fit
3. training
4. recycle
5. protecting
6. determined
7. environmentally friendly
8. conservation
9. global warming

Exercise 3:
1. will be watching
2. will help
3. have you seen
4. will have finished
5. are leaving
6. had lost
7. am going to live
8. met

WORK BOOK
Page 32
Exercise 2: 
1. increase
2. pollution
3. harm
4. landfill
5. decompose
6. care about
7. protect
8. recycle

Exercise 3:
1. eat too much
2. oppose
3. you've used it before
4. other schools
5. several colours
6. hasn't got

Exercise 4:
1. anti
2. under
3. re
4. over
5. inter
6. multi

Page 36
Exercise 1:
a. 5
b. 4
c. 7
d. 8
e. 6
f. 1
g. 2
h. 3

Exercise 2:
1. care about
2. protect
3. ecological disasters
4. damages
5. pollution
6. increase
7. interconnected
8. multinational

Exercise 3:
1. I'll answer
2. will have finished
3. will have become
4. is visiting
5. are going to discuss
6. will be preparing

Exercise 4:
1. is going to buy
2. will enjoy
3. will have completed
4. am going to meet/ am meeting
5. sill still be sleeping
6. will get