Part 1.
1. were sitting - rang
2. had - was
3. were playing - came
4. was having - was swimming
5. rained - was planting
6. are studying - are watching
7. made - was talking
8. was taking - were eating
Part 2.
1. Where was she working when her father called?
2. What were Peter and his brother doing when the power went out?
3. Were you doing anything at 10 a.m this morning?
4. What were your parents do when your sister came home?
5. Who was your mother talking to last night?
Part 3.
1. one → Ф
2. Germany → German
3. was → were
4. were having → had
5. The one
6. speaking → speak