30. It is very dangerous to use a cell phone _______ driving on a busy highway.

　 A. after　　　　　　 B. though　　 　　　　C. while　　　　　　 D. since

29. Most people can not _______ rubbish items such as cigarette butts and plastic bags as they are most dangerous to our environment.

28.The travel agency booked my flight and a(n) _______ hotel for me, where I stayed comfortably for a fortnight.

27. With so many people _______ into the Automobile Fair next Sunday, I don’t think it’s a good idea to go enjoying those beautiful cars.

26. Public opinion was moving strongly _______ the government’s quick action to the A /H1N1 flu.

25. - Is it possible that they will go traveling by plane?

　 - _______. They like enjoying the scenery along the roads.

24. The more you are_______ the mental wealth, the healthier your life will become.

23. Even though he has been in Shanghai for a year, Mike still can not _______ himself to the

　 Chinese food.

22. Would you please keep silent? Our monitor ______ something important now and I want to listen.

　 A. has reported　　　 B. is reporting　　　　 C. reported　　　　　 D. report

21. - How often do you go back home to see your parents?

　 - _______, but usually twice a month.

　 A. It’s a secret　　 　　　 　B. I have no idea　　　 C. It’s hard to say　　 D. I don’t mind it