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
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