What color is our national（国家的）flag(旗帜)? It’s ________.

David, your mother’s birthday is _____. Let’s think about how to celebrate it.—OK, Dad.

This __________my quilt，These __________my books.

It is really_______ to take a walk along the peaceful country road.

It is thought that one billion people I the world, _is half the word’s workers, earn their living by farming.