第二部分英语知识运用（共两节满分30分）
第一节单项填空（共15个小题，每小题1分，满分15分）
（）16 —_________ was light bulb invented ________ ? —Thomas Edison.
A. When, / B. Who, by C. Who, / D. What, for
（）17 He doesn’t do his homework___________, though he has ___________.
A. carefully enough , enough time B. enough carelessly, time enough
C. carelessly enough, enough time D. enough carefully , enough time
（）18 Did the police catch the thief___________?
A. on the end B. by the end C. at the end D. in the end
（）19 When I was a child, I used to ___________ chocolate.
A. liking B. like C. liked D. likes
