The boy had his leg _____ while ____ football.
.If you use another method to solve this problem, you’ll probably ______ it.
.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.