1.the doorbell (ring).......rang....while Tom (watch)........was watching...TV
2.How fast were you (drive).....driving....when the accident (happen).....happened.....
3.An and Susan (make)....were making......dinner when Martin (arrive)....arrived...home
4.The light (go) ...went......out when we (have) ..were having.......dinner, but it (come).....came.....on again after about ten minutes
5.It suddenly (begin)....began......to rain while Laura (sit)....was sitting......in the garden
6.What were you (do) .....doing...this time yesterday?
I (work).....was working........on the computer
7.It (be)....was.....cold when we (leave).....left.... the house that day and a slight snow (fall)....was falling..
8.When I last (see)....saw.....them they (try)....were trying.......to find a new house near their word
9.I (walk)......was walking.......along the street when I suddenly (feel).....felt....something hit me in the back. I (not/know)......didn't know.....what it was
10.When we (drive).....was driving......down the hill, a strange object (appear)..appeared.......in the sky
11.What (you/do).....were you doing.....this time yesterday? I was sleeping
12.When we came, he (read)...was reading........books
13.I (see).....saw.......Sune in town yesterday but she (not see).......didn't see....me. She (look).......was looking....the other way
14.I(meet).......met......Tom and An at the airporta few week ago. They (go)....went...... to Berlin and I (go)....went......to Madrid. We (have).......had......a chat while we (wait)....were waiting.......for our flight
15.I (cycle)......was cycling.......home yesterday when suddenly a man (step)..... stepped.....out in to the road in front of me. I (go)......went.......quite fast but luckly I (manage).....managed.......to stop in time and (not/hit)......didn't hit....him
16.Jane (wait)....was waiting.......for me when I (arrive)..........arrived........
17. (you/go)....Did you go........out last night ? No, I was too tired
18.John (take)...was taking........a photograph of me while I (not/look) didn't look
19.I haven't seen Alan for ages. When I last (see).......saw.....him, he(try)......was trying...... to find a job in London
20.I(walk)......was walking........along the street when suddenly I (hear)...heard.........footsteps behind me. Some body (follow).....was following...... me. I was frighted and I (start)......started.....to run.