write for since
a) I have been Moscow ___ Monday
b) I have been to Moscow _____ a week
c) I have been waiting for my friend ____ an hour
d) Dmitry lives in the north. He has been living there _____ last year.
e) I am at school. I have been here _____ 8 o*clock.
f) My niece is good at basketball. She has been playing basketball ____ 5 years