Я не очень уверенна, что правильно сделаю номер 3, но вот то, с чем могу помочь:
Номер 4:
You: I was reading a book.
Policeman: Who were you sitting next to?
You: I was sitting next to Mark and Tony.
Policeman: Were they reading?
You: No, they were doing an exercise.
Policeman: What was your teacher doing?
You: He was standing near the window.
Policeman: Was he looking out of the window?
You: No, he was not looking out of the window.
Номер 5
1) was driving
2) was making, burst
3) was looking, saw
4) came, were playing
5) was taking, began