I

1,a – nation

2, c-feature

3, a-established

4, d-practiced

II

1, a – look after

2, a –was alive

3, c-at

4, a-animals

5,a- on

6, d-A and B

III

1, raining

2, variety

3, invitation

IV

1, hadn’t missed; wouldn’t have been

2, would have been; had walked

3, could have gone; hadn’t got sick

4, hadn’t failed

5, hadn’t driven; would not have happened

V

1, If he had prepared for the interview, he wouldn’t have got the job.

2, We would not have come home from our holiday early if we hadn’t ran out of money.

3, If I hadn’t gone to bed late, I would not have felt tired in the morning.

4, If the fire brigade hadn’t come immediately, the house would have burnt down.

5, If we could got a bus, we would not have left the party late.

6, If I had known how difficult it was, I would not have taken the job.