Question

Помогите!!Нужно выбрать правильное!!
Students were having/had/did have a party when the doorbell
Nobody rang/was ringing/were ringing it because everybody were dancing/danced/was dancing
So when Peter finally opened the door, a very angry policeman were entering/was entering/entered
Даю 15 баллов

Answer 1

were having
was ringing were dancing 
was entering

Answer 2

did were ringing was dancing was entered