a)I have been to 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 ___ 8o'clock.
f)My niece is good at basketball .She has been playing basketball ___5 years