Помогите пж номер 28

2) Have you ever been in Australia?
3) No, it was closed...
4) I was living here for 3 years...
5) I tried to fix it...
6) is
7) went
8) lost
9) were
10) We walked all morning
11) did you buy 
12) will you leave
13) was doing
14) was waiting
15) will go
16) had
17) I did not fly before