5 а
6 с
7 b
8 c
9 a
10 b
My father has been working since morning
Her grandmother has been cooking since 2 o'clock
My sister's have been sleeping since 2 o'clock
She has been reading since morning
They have been talking on the phone about 20 minutes
The boys have been playing football for 2 hours
He has been studying Germany since 5 years
My teacher has already been writing his book 2 years
I have been doing my homework since 2 o'clock
We have been living in city since 2005