1.

1. has slept;

2. met;

3. arrived…had nearly finished;

4. have you seen… have lost;

5. had left;

6. knew… had already seen;

7. stopped…had left;

8. have you heard;

2.

1. returned…had done…were;

2. has never flown;

3. tried…went…had moved;

4. has Susan already finished;

5. had eaten…sat … exchanged;

6. haven´t seen;

7. got… had already begun;

8. bought… had won;