Ex 1: 1, phoned
2, have worked
3, work
4, have made
5, saw
6, went
7, has been
8, was
9, left
10, has left
Ex 2: 1, went up/ have gone up
2, operated/ have set up
3, Do you see/ left
4, doesn't look/ have come
5, never spoke/ spoke
6, have worked/ want/ Have you heard
Ex 3: 1, have been looking at/ have noticed
2, have been calling/ has gone
3, Have you seen/ have been looking forward
4, have you produced
5, have invested
