Неозначені займенники

Do you know... about this sportsman?

Has... done this exercise?

What are you doing? ...

Is there... to eat in the fridge?

We went shopping but bought...

I am thirsty. Could you give me...to drink?

The room is empty. There isn't... there.

The room is empty. There is...there.

I have done this exercise myself. ...has helped me.

I can see...on the table.

I can't see...in the darkness.

... could answer his question.