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 ____________

18.Good luck with your new diet and lifestyle. 愿新的日常饮食几生活方式为你带来好运(成功)。(P70)

(1)luck是名词，意为“运气、幸运”。例如：

He always has good luck.他总很走运。

I wish you luck. 祝你幸运。

(2)若表示“祝(你)好运；祝(你)顺利；祝(你)平安！”，则表达为：Good luck!

Good luck 后接人时用 Good luck to sb.，Good luck后接sth.时用Good luck with sth. 例如：Good luck to you!

Good luck with your English!

17.I like hamburgers but I don’t eat them any more.我喜欢汉堡包，不过我不再吃了。(P70)

not…any more意为“不再……”。例如：

I won’t be late any more.我再也不迟到了。

He doesn’t play computer games any more.他再也不完电脑游戏了。