Complete the sentences. use the present perfect or the present perfect continuos (progressive) 1) the central museum is not far from my office. i (visit) it many times. 2) i (read) this book since 12 o"clock and i still cannot understand it quite well. 3) colin is writing a letter to her parents. she (write) it since she came home from school. it"s going to be an interesting letter , i think. 4) i (write) my friends in the u.k. at least a dozen letters since i left the country and came here. 5) miss white (teach) school children for 10 years . she's one of the best teachers at the elementary school.