помогите с упражнением

нужно раскрыть скобки и поставить в pat simple или past perfect
1 tom....(go) for a walk after he ...(watch) the news
2 i ...(start) working at the national bank after i....(graduate) from university
3 tania ...(just/mop) the floor when her son ...(spill) milk or over it

Tom went for a walk after he had watched the news
I started working at the national bank after I had graduated from university
Tania had just moped the floor when her son spilt milk over it