A. brush one's teeth B. certainty C. Saturday D. write English A. use B. by coincidence C. make a difference D. facilitate A. grateful B. quarter C. lasting D. jigsaw A. halt B. twenty-three C. magician D. find A. puma B. July C. black-and-white D. have pity on A. map B. opportunity C. lamp D. grapefruit A. deteriorate B. tip C. on the left D. sure A. verify B. homestay C. next D. doughnut A. they're B. rigid C. longitude D. upstairs A. aerial B. answer C. blow out the candles D. club