Pronouns

Have you bought ... in the shop?

Are you waiting for ... ?

I found ... books on the table yesterday.

... has phoned me last night.

... advises me to stay at home.

Silence! ... is downstairs.

Do you know ... here?

Can ... of you help me to close the window?

There is always ... I don't understand.

We have new friends. Have you ... ?

I take ... sugar with my tea.

" Can you help us? " - " ... problem. "