Ex.3
1. ate dinner
2. used to live
3. when they saw
4. didn't pass
5. were having
6. he was having / taking
7. Did you belong
8. he wasn't speaking
Ex.4
1. did you fail
2. used to train
3. wasn't listening
4. We were doing
5. enjoyed studying
6. didn't use to
7. were you talking
8. she drank
