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На, вроде всё тут понятно
3
1 didn't open
2 was hurrying, met
3 translated
4 were smoking, saw
5 were packing, came
6 finished
7 What did he do ... studied
8 asked
9 wrote
10 came, didn't call
4
1 Why were you ... I wasn't
2 Where were you ... We were at the theatre
3 When I was coming to the bus stop, I saw a boy, who was playing with a dog
4 It was 11 o'clock, when I decided to go to bed.
108.
4. I was making a snowman while they were skating.
6. We were cleaning the rooms while mum was cooking dinner.
109.
2. They WERE playing chess while we WERE playing football.
4. Jane WAS speaking with her friend while we were watching TV.