More Practice 4: Answer key

UNIT 4
Vocabulary, page 180

1. 
1. skyscraper
2. crime rate
3. quality of life
4. free of charge
5. round the clock
6. landmark
7 pay a fine
8 housing
9 overcrowding
10 wealthy

2. 
1. up
2. off
3. into
4. down
5. in
6 down on
7 across
8 out

3
1. dissatisfied
2. codesigned
3 unhealthy
4. overcrowded
5. reread
6 misbehave
7 misuse
8 inequality
9 impossible
10. underfed

4.
1. megacities
2. giant
3. housing
4. land
5. inequality
6 wealthy
7 equal

GRAMMAR, PAGE 181

1. 
1. might
2. could
3. ought to
4. must
5 can

2
1. could/ was able to
2. couldn't / wasn't able to
3. can/ is able to
4. hasn't been able to
5. can't /aren't able to

3
1. should
2. can't
3. mustn't
4. should
5. ought
6. can't
7 would
8 could
9 be able to
10 don't have to

4
1. can't have
2. don't have to/ needn't
3. should/ ought to
4. may/ might
5. shouldn't have/ oughtn't to have
6. should have/ could have/ ought to have
7. should /ought to
8. could/ was able to
9. must have

5.
1. e
2.c
3.b
4.d
5. g
6. f
7. a

6. POSSIBLE ANSWERS
1. should have left much earlier
2. must be very tiring
3. must have stolen it
4. would have come with you
5. can't be his sisters