Ответ:
Let's meet at five o'clock.
They are having dinner now.
Will you go to the library after classes tomorrow?
Did you get up at 7 o'clock this morning?
I didn't meet my best friend yesterday.
I have already done my household duties.
He did not visit the British Museum.
We are talking about famous writers now.
We haven't come there yet.
When I return, I shall call you then.