Indefinite pronouns

I didn't see Max at the gym. In fact, I didn't see __________. The place was empty.

Bob, __________ is here to see you.

Look into that bag. I bought you __________

I need __________ to talk to. I am very lonely.

It was really dark and I couldn't see___________.

Does______________ live in that house?

The shop is closed._____________ has gone home.

I've got _____________ to tell you.

I heard a knock at the door but there was___________ there.

Calm down. There is___________ to worry about.

____________ enjoyed the concert. They stood up and cheered.