Using "used to"

giải dùm mik nho.
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3. Using "used to":
1. John smoked a lot a year ago, but now he doesn't smoke any more.
> John used to... ..
2. They used to go to Vung Tau at weekends
> They. .
3. Tom no longer gets up late in the morning.
> Tom used
4. Lan was my best friend before, but now we aren't friends any more .
> Lan used ...
5. He drank much milk when he was a baby boy.
> He used.. .
6. Mary used to go swimming after school last year.
> Mary used ...
7. I don't find it difficult to get up early in the morning.
> I am used ...