Exercise 1

1 a

2 b

3 b

4 a

5 b

6 a

Exercise 2

1 may well

2 is likely that

3 are certain to

4 is unlikely to

5 could

6 definitely won't

Exercise 3

1 Scientists might find a cure this century.

2 The medical team will definitely publish their findings soon.

3 An overnight cure is unlikely to be found.

4 The pills will probably be avaliable soon.

5 The new diet is certain to be popular.

6 It is probable that obesity will increase.

Exercise 4

1 Ture

2 Ture

3 False

4 Ture

5 False

6 Ture