Неозначені, заперечні займенники

Choose the correct pronoun.

The room is clean. ... has tidied it up.

The room is dirty. ... has tidied it up.

... in our family does household chores.

Are you going ... this weekend?

We'd like to go ... together in summer.

Don't tell ... about it. It's a secret.

... who went camping had a good time.

We haven't eaten ... since breakfast.

The question is difficult. ... can answer it.

My brother hasn't picked up his toys. They are ... in the room.

There is ... wrong with our washing machine.

... needs good friends.