I/1buy
2 was playing
3 to continue
4 have studied
II/1 exciting
2 interested
3 friendly
4 had finished
III/1 she asked me If I was a foreigner.
2 This computer is exported to seventy diferent countries
3 The man sitting next to me is my father's' friend
4 It is a contest in which all school girls arranged flowers as attractively as they could held by our school.