Complete the following sentences with the present perfect or past simple

Complete the following sentences with the present perfect or past simple.
1. Sam.......... a new cell phone a few months ago. (buy)
2. I didn't know that he bought a new cell phone. Yes, he............. it for a few months now. (have)
3. Last year we............  to Scotland for our holidays. (go)
4. You look relaxed! Yes, I.............  on vacation. (just been)
5. I can't join you now because I .......... my homework yet. (not do)
6. I..........  all my homework yesterday afternoon. (do)
7. I......... very well the last nights. (not sleep)
8. Are you tired? Yes, I............. a hard day. (have)
9. Here is the news. There ............. an accident on the M1 near Nottingham. (be)
10. I ............. my keys. Did you take them with you this morning? (lose)
11. Tom ............ in Sydney all his life. (live)
12. How long.............  out last night? You look tired. (you stay)
13. ............. an accident? No, never. (you ever have)
14. My sister is going to Italy in the summer. That's why she...........  to learn Italian. (start)
15. I..............  a cold last year. (not have)