Choose the correct verb form. a) How long has Dmitry been living / does he living / in Astana? b) How long has Omar been studying / does he study / at school N15? c) My freinds has been looking / looked / for a bike for 3 week d) I wrote / have been writting / this exercise since 4 o'clock p.m. e) I am tired because I wrote / have been writting / this exercise since 4 o'clock p.m.

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a)How long has Dmitry been living in Astana ?b)How long has Omar been studying at school №15c)My friends has been looking for a bike for 3 weekd)I have been writing this exersise since 4 o*clock e)I am tired because i have been writing this  exersice since 4 o*clock