Complete the sentences. Use the past simple or the past continuous: While my cousin and I 1............ (have) dinner at the restaurant last night, we 2 ............(see) a friend of mine. I 3............ (introduce) her to my cousin. When I 4............(hear) a knock at the door last night, I 5............ (walk) to the door and 6............(open) it. When I 7............ (open) the door, I 8............(see) my brother. I 9............(greet) him and 10............(ask) him to come in.