Present Perfect или Present Progressive?
I (write) to them three times, but I (get, not) any answer yet. 5) Bill (be) here since the 5th of November 6) I (meet) Mrs Gordon many times this week 7) Colin, you (miss) already very many classes 8) I (phone) Diana for three hours already , but she is not at home yet 9) I (work) on the computer since six and I (finish , not) yet 10) I always (want) to make a tour. of Spain 11) the telephone (ring) for almost a minute 12) I even (have coffee , not) yet 13) they (build) their house for a year and a half.

4) I (have written) to them three times, but I (have not got) any answer yet. 5) Bill (has been) here since the 5th of November. 6) I (have met) Mrs Gordon many times this week. 7) Colin, you (have already missed) very many classes. 8) I (have been phoning) Diana for three hours already, but she is not at home yet. 9) I (have been working) on the computer since six and I (have not finished yet. 10) I have always wanted to make a tour of Spain. 11) The telephone has been ringing for almost a minute. 12) I haven't even had coffee  yet. 13) They have been building their house for a year and a half.