11. Chinese athletes have also made important c______ to the Olympic Games.

12.Some of the Olympic athletes who have brought joy to people across the world with their a______ to push the boundaries of human achievement.

13.Better finish your work before watching TV.______ (否则)you’ll have to stay up late.

14.I am delighted to have been invited to your school to talk to you about the history and s_______ of the Olympic Games.

15.Mr. Smith will be in charge of the business during my father’s a__________.

16.He likes drinking so much. It is u__________ for him to refuse a drink today, totally out of my expectation.

17.Joe was celebrating his success with his colleagues. _________（与此同时）, his father was waiting for him at home.

18. Some old customs that were not matched with the reality have been ________ (移除).

19. In fact, Australia is the only country that is also a __________ (大陆).

20. His lecture is on ___________ (当代的) American novelists.