EXERCISE N°A PAGE 42

1. Can’t
2. Should
3. Could
4. Can
5. Can
6. Have to

EXERCISE N°B PAGE 42

1. You should go to the dentist
2. They can’t be at home
3. He may not come
4. You don’t have to take any warm clothes with you
5. Could you close the window
6. Shall I help you

EXERCISE N°C PAGE 43

1. Can’t have won the prize
2. May have lost their keys
3. Must have rented a house in the suburbs
4. Needn’t have done the wash
5. Should have packed earlier
6. Could have overslept

EXERCISE N°D PAGE 43

1. Oughtn’t to have
2. Had
3. Must
4. Didn’t have to
5. Was able to
6. Needn’t have
7. Could have

EXERCISE N°E PAGE 43

1. Must
2. Cannot
3. Might
4. Needn’t
5. Have to
6. Used to
7. Should