It’s _____ hard problem for the twins that ____ of them can work it out.
Let’s ___ __ football after school!
---Is that woman______the right your aunt?---No, she isn’t. The woman in front______me is my aunt.
--- How many students are there in your classroom now?--- There aren’t ______.
--- _____ the dining hall? --- It’s behind the red building.
---_____are you? ---I am twelve.