I. 1. had
2. would have told you
3. would have sold
4. were
5. were
II. 1. had driven, had driven, wouldn't have run
2. had told, had told, would have tried
3. had gotten, would have phoned
4. had, would do
5. took
III. 1. had known, would have written
2. hadn't rained, would have visited
3. had had (да, два раза), would have driven