Complete the sentences choosing present progressive or present perfect progressive.
1) I (write) to them three times, but I (get, not) any answer yet.
2) Bill (be) hart since the 5th of November.
3) Colin, you (miss) already very many classes.
4) it's 11 p.m. I (work) on the computer since six and I (finish, not) yet.
5) I always (want) to make a tour of Spain.