25. the sooner the task will be done, the fewer people can be _________(牵涉)in.

24. When people in _________ (权力) is absent, people will do as they like.

23. Now Daniel’s father is the youngest __________(教授)in his university.

22. Christopher Columbus was a ___________(勇敢的)man to go where no one had gone before.

21. Einstein developed __________(理论)of relativity.

15．转折点____________________　　 20.worm virus ________________

14．登陆，着陆 ________________　　 19.give permission to _________

13．自由勋章___________________　　 18. one giant leap____________

12．试图_______________________　　 17. cut short________________　

11．海军飞行员_________________　　 16. out of control ____________