Ответ:

1. By the time we get to Richmond we will have driven over three hundred miles. (a)

2. We always go to Paris when we want to have some fun (a)

3. By the time you make up your mind to marry Connie she will have grown old (b)

4.John was playing the piano when the telephone rang.(b)

5. The TV set was being repaired when Mary returned (c)

6. Where is Dickie? He is playing in the garden (b)

7. If I had known that you were leaving I would have bought you a present (b)

8. They were sitting in the garden when they heard Deborah's voice (b)

9. I have been sitting here for two hours already (c)

10. Daniel. learnt that Christie had left for Diepe (d)