Past Simple or Present Perfect

Sam (buy) a new cell phone a few months ago.

Last year we  (go) to Scotland for our holidays.

You look relaxed! Yes, I (just be) on holidays.

I (do) all my homework yesterday afternoon.

I (not sleep) very well the last nights.

Are you tired? Yes, I (have) a hard day.

 I (lose) my keys. Did you take them with you this morning?

Tom (live) in Sydney all his life.

How long (you stay) out last night? You look tired.

(you ever have) an accident? No, never.

I (not have) a cold last year.

She (not try) paragliding yet.