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Key t o Exercises

29.3 UNIT 31 6 I don't think you should go to
3 He might get up early. work.
31.1
4 He isn't/He's not working 7 I think he should go to the
2 must meet 5 must go
tomorrow. doctor.
3 must wash 6 must win
5 He might be at home 8 I don't think we should stay
4must learn 7 must be
tomorrow morning. there.
6 He might watch TV. 31.2 32.5
7 He's going out in the 2I must 5 I had to Example answers:
afternoon. 3 I had to 6 I had to 2 I think everybody should
8 He might go shopping. 4I must 7 I must have enough food.
29.4 31.3 3 I think people should drive
1-3 Example answers 2 don't need to rush more carefully.
I might buy some new clothes. 3 mustn't lose 4 I don't think the police
I might go out with some 4 don't need to wait should carry guns.
friends. 5 mustn't forget 5 I think I should take more
I might have an egg for 6 don't need to phone exercise.
breakfast. 31.4
UNIT 33
2 C 4 B
UNIT 30
3 A 5 D 33.1
30.1 31.5 2 have to do
2 Can you ski? 3 don't need 3 has to read
3 Can you play chess? 4 had to 4 have to speak
4 Can you run ten kilometres? 5 must 5 has to travel
5 Can you drive (a car)? 6mustn't 6 have to hit
6 Can you ride (a horse)? 7must 33.2
7 I can/can't swim. 8 had to 2 have to go
8I can/can't ski. 9 don't need 3 had to buy
9 I can/can't play chess. 10 mustn't 4 have to change
10 I can/can't run ten kilometres. 5 had to answer
11 I can/can't drive (a car). UNIT 32
33.3
12 I can/can't ride (a horse). 32.1 2 did he have to wait
30.2 2 You should go 3 does she have to go
2 can see 3 You should eat 4 did you have to pay
3 can't hear 4 you should visit 5 do you have to do
4can't find 5 you should wear
33.4
5 can speak 6 You should take
2 doesn't have to wait.
30.3 32.2 3 didn't have to get up early.
2couldn't eat 2 He shouldn't eat so much. 4 doesn't have to work (so) hard.
3 can't decide 3 She shouldn't work so hard. 5 don't have to leave now.
4couldn't find 4 He shouldn't drive so fast.
33.5
5 can't go 32.3 3 have to pay
6 couldn't go
2 Do you think I should learn 4 had to borrow
30.4 (to drive)? 5 must stop or have to stop
2 Can/Could you pass the salt 3 Do you think I should get (both are correct)
(please)? another job? 6 has to meet
3 Can/Could I have these 4 Do you think I should invite 7 must tell or have to tell
postcards (please)? Gary (to the party)? (both are correct)
4 Can/Could you turn off the 32.4 33.6
radio (please)?
3 I think you should sell it. Example answers:
5 Can/Could I borrow your 4 I think she should have a 2 I have to go to work every day.
newspaper (please)?
holiday. 3 I had to go to the dentist
6 Can/Could I use your pen 5 I don't think they should get yesterday.
(please)? married. 4 I have to go shopping
tomorrow.
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