20. -- I’d like to take a month’s holiday. _{w.w.*w.k.&s.5*}

　　 --___________ . We are too busy.

　 A. Don’t worry　　　　　　　 B. Forget it

　 C. Don’t memtion it　　　　　 D. Pardon me

19. The flag looks especially beautiful _______________　the blue sky.

　 A. against　　　　　 B. on　　　　　　 C. towards　　　　 D. beyond

18. I’m moving to the countryside because the air there is much fresher than ___________ in the city.

　 A. ones　　　　 B. one　　　　　 C. that　　　　　　 D. those

17. _____________　that I couldn’t be absorbed in the work.

　 A. They made so many noise　　 B. So loudly they talked

　 C. It was so noise outside　　　　 D. Such a loud noise did they make