1 saw / was / had seen / remembered / was

2 knocked / was / had gone / didn't want

3 went / got / had already waited / arrived

4 was lying / wasn't watch / fell / was snoring / turned / woken up 

5  went / was reading / heard / got / didn't see / went

6  had to go / missed / was standing / realised / had left /  had / had got back 

7  met / was walking / had been / had been playing / were going / invited / had / didn't have 

9 was cooking / was playing

10 was studying / heard

1 A few days ago _I__saw___ ( I/see ) a man at a party whose face __was___ ( be ) very familiar. At first I couldn't think where ___I had seen___ ( I/see ) him before. Then suddenly ___I remembered___ ( I/remember ) who __i was____ ( it/be ).
2, . I went to John's room and ____knocked__ ( knock ) on the door but there was  ( he/go ) he had gone out or ____he did not want__ ( he/not/want ) to see anyone.
3, Yesterday afternoon Sharon went to the station to meet Paul.When she got there,Paul had already waited for her. His train arrived early. 
4, When I got home,Bill was lying onthe sofa. The television was on but he wasn't watching it. He fell asleep and he was snoring loudly. I turned the television off and just then he had woken up. 
5, Last night I went to bed and I was reading a book when suddenly I heard a noise. I got up to see what it was but I didn't see anything, so I went back to bed. 
6, Mary had to go to New York last week,but she almost missed the plane.She was standing in the queue when she suddenly realised that she had left her passport at home. Fortunately, she doesn't live very far from the airport, so she had time to take a taxi home to get it. She had got back to the airport just in time for her flight. 
7,  I met George yesterday as I was walking through the park.He had been in the Sports Centre where he had been playing tennis. He was going to a cafe for a drink and invited me to join him but I was arranged to meet a friend and I didn't have time.