Jack hasn’t paid for his education, has he—________. His uncle will come and pay this afternoon.

Why are you so tired these days—Because I have ________ work to do.

Sam, you don’t work hard at geography.— My dad says that the world is changing every day, I decide to wait until it stops.

Tom’smother told him eating toomuch meat.

past several weeks, many cities in NorthernChina from heavy fogs and severecold