1) How long has Duman been living/does he live in Astana? 2) How long has Omar been studying/does he study at school 15? 3) My friend has been looking/looked for a bike for 3 weeks 4) I wrote/have been writing this exercise since 4 o'clock pm.

A) How long has Dmitry been living in Astana?

b) How long has Omar been studying at school №15

c) My friends has been looking for a bike for 3 week

d) 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