_____ are you staying in Tibet? — Just for four days. [ ]

The Blacks decide to go sightseeing ______ September 2nd. [ ]

She is a mother ______ four children.[ ]

Are Mr. and Mrs. Black at home? — No. ________ of them are at work.

Wow, so many new houses! I can’t believe that. It used to be a poor village.— Yes,_________ has changed here.