13a would not be
14c if she hadn't contributed positively we couldn't have continued with that project
15b were/would go
16d reviewed
17b because I had to do so much work i couldn't go to the movies
18c are/will never be admitted
19c they will be caught
20c had been
3.1a had been-> were
2d will-> won't
3b had knew-> had known
4a am-> were
5b find in-> find out
6d would stop-> would have stopped
7b you would do-> would you do
8b is not-> was not
9a had I known-> I had known
10b will go-> would go
11c be-> been
12b because-> if
13d would go->will go
14a will study-> study
15d to go-> go
16c to the-> for the
17d occur-> would occur
18a would have studied-> had studied
19b will be-> were
20a saw-> see
