20. A. door B. gas C. window D. motor

　 难句注释

　 ①...and now he was having trouble staying awake. 现在他很难保持清醒。

　 ② It was then that he noticed the hitchhiker by the road.

　 就在那时他注意到马路边有个搭便车者。

　 此句是It is/was...that...的强调句型。

　 ③ John watched until his passenger had disappeared from sight, then stepped on the gas and drove out of town.

　 约翰一直注视着他的乘客直到他消失在视线之外，然后踩足油门驶出了小镇。

　 Passage A

　 本文介绍了为庆祝冬季奥运会的召开，各国常发行一些纪念邮票。

19. A. driver B. friend C. passenger D. thief

18. A. giving B. offering C. handing D. returning

17. A. frightened B. puzzled C. worried D. curious

16. A. knives B. photos C. handkerchiefs D. bills

15. A. important B. very C. long D. short

14. A. reached B. forced C. got D. put

13. A. restaurant B. shop C. hotel D. station

12. A. afraid B. hungry C. cold D. sleepy

11. A. paying B. having C. carrying D. borrowing