35. ____ in thought, he almost ran into the car in front of him.

　 A. Lost　　　 B. Having lost　　　 C. Losing　　　 D. To lost

34. Only in this way_____ to make improvement in the operating system.

　 A. you can hope　　　　　　 B. you did hope　

　 C. can you hope　　　　　　 D. did you hope

33. Though _________, climbing does much good to students’ health and character.

A. to be tiring　　　　　 B. tired　　　　　　　　　　　　 C. tiring　　　　　　　　　　　　 D. to be tired

32. If you are _______ about the Pyramids in Egypt, just read the book written by Dr. Brown.

　　　 A. anxious　　　　　　　　 B. curious　　　　　　　　 C. serious　　　　　　　　 D. puzzled