PRESENT PERFECT  Помогите пожалуйста  a)My friend started reading an interesting boook a

PRESENT PERFECT Помогите пожалуйста
a)My friend started reading an interesting boook a month.
He is still reading it. He has been reading the book since last month.
c) Victor began writing a letter to his pen-friend in the U.K. last week and he is still writing it.
................................................................... since last week.
d) Omar"s father started driving his car when he was 20 and he is still driving it.
................................................................... sinke last 20.
e) Carol"s father began learning Kazakh 7 months ago. He is still learning Kazakh.
................................................................... for 7 months.
f) Dmitry started learning Kazakh a year ago.He is still learning it.
Dmitry........................................................ since last year.
g) Our teacher began telling us a story about school children of Britain at 3 o"clock.He"s still telling us the story. It is interesting. I"s now 3:45
................................................................... for minutes.