Ответ:

1. was
2. he had replied
3. the day before
4. she could not come
5. to fall
6. the next day
7. were
8. to lend me
9. he had been watching
10. had to rest

1 was

2 he had replied

3 the day before (the previous day)

4 she couldn't come

5 to fall

6 the next day

7 are

8 to lend me

9 he had been watching

10 had to