I ….. (be) in London last summer.
was
Look out! Who….. (watch) you?
is watching
Sometimes Maria ….. (cook) lunch for herself.
cooks
Nick …. (not/go) to the Caucasus last year.
didn't go
The manager is busy. He …..(talk) with a customer.
is talking
My grandfather usually ….. (work) in the garden in the morning.
works
I often ….. (buy) food on Fridays.
buy
I ….. (do) my homework last Monday.
did
My sister ….. (clean) the kitchen now.
is cleaning
Sorry! I … (be late).
am