I
1. didn't go
2. made
3. How did you spend. . .
II
1 .were doing
2. weren't writing
3. Was it raining. . .
III
1. came. . . was crying
2. stopped. . . were walking
3. rang. . . were having
IV
1. They arrived at her house a little before 9p.m.
2. The dog was barking the whole night.
3. They were not snowboarding all day long.
4. What were you doing at the time of the accident?
V
1.was. . . was
2. did. . . was
3. were. . . did