Помогите пожалуйста воткнуть в правильной форме !!

Пишу только то, что надобно вставить:

1 the most careful; us

2 was reading

3 was taken

4 children; bookshelves

5 themselves

6 were talking; came

7 first; more difficult; second

8 had travelled

9 have found; earlier

10 had lost

11 tells

12 would arrive; was expected

13 ourselves

14 biggest; them