tenses

[Gość: Polk]

In some of these sentences the tense is not suitable. Could you tell me where
and what tense would be correct?

They all wanted to believe her, but suspected she was lying.
Although it rained a lot, I was enjoying my holiday last year.
I didn't know you had bought a new car.
What did you wear to the Ponsonbys' party?
Harry tried to repair the car, but he didn't really know what he was doing.