.--What are your parents?--My father is a teacher, and my mother is _________.
. My hometown,_______ I spent my happy childhood, has changed a lot.
. -----Can I smoke in this hall? ----No, you can’t. If you_____ , please go to the smoking room.
. -----I’m terribly sorry to have put you through so much trouble. -----________. I know you didn’t mean to.
. It was ______ the 19th century_____ heat was considered to be a form of energy.
. Don’t you think ti is unfair for about two thirds of the population to have no_____ to health care?