3d key

Ex 1
1 b 2 a 3 b 4 b 5 c 6 c
Exercise 2 page 33
1 might have told me
2 is / was supposed to be here
3 oughtn’t / ought not to have gone
4 could have been / could be worried about
5 can’t have gone to the
6 must have been (very) cold
Exercise 3 page 33
1 could have 2 should have 3 may have 4 must
have 5 could have 6 can’t have
Exercise 4 page 33
1 didn’t need to get
2 didn’t need to take / needn’t have taken
3 didn’t need to catch
4 didn’t need to buy / needn’t have bought
5 needn’t have worried
6 needn’t have / didn’t need to
Exercise 5 page 33
1 needn’t have reminded me
2 was supposed to be here
3 ought not to have told
4 could have warned me that
5 they didn’t need to ask

Exercise 6 page 33
1 Lunch was provided so they didn’t need to take sandwiches.
2 She studied hard so she should have passed the exam.
3 I think he’s foreign so he might not have understood you.
4 John can’t be in Rome – I saw him earlier.
5 You ought to have listened to my advice.
6 You might have introduced me to your friends!