6) were you doing
7) was trying
8) was having
9) didn't hear
10) was
11) was raining
12) arrived
13) had
14) bought
15) was walking
16) broke
1. the phone rang
2. was cleaning his car
3. I phoned him
4. visited a museum, while you were reading newspaper
6) were you doing
7) was trying
8) was having
9) didn't hear
10) was
11) was raining
12) arrived
13) had
14) bought
15) was walking
16) broke
1. the phone rang
2. was cleaning his car
3. I phoned him
4. visited a museum, while you were reading newspaper