题目

一台电视机降低的价格500元后，售价是1500元，降价百分之几？ 答案：解：500÷（1500+500）×100% =500÷2000×100% =25% 答：降价25%。完形填空(共20小题；每小题l分，满分20分) 阅读下面短文，从短文后各题所给的A，B，C，D四个选项中，选出最佳选项，并在答题卡上将该项涂黑． Last night I was driving from Harrisburg to Lewisburg, a  36  of about eighty miles. It was late and I was in a hurry. However, if anyone asked me how fast I was  37  ,I’d say I was not over-speeding. Several times I got  38  behind a slow-moving truck on a narrow road, and I was holding my fists tightly with  39  . At one point along an open highway, I  40  a crossroad with a traffic light. I was alone on the road by now, but as I  41  the light, it turned red and I braked to a stop. I looked left, right and behind me. Nothing. Not a car, no suggestion of headlights, but there I sat, waiting for the light to  42  , the only human being for at least a mile in any  43  . I started  44  why I refused to run the light. I was not afraid of being  45  , because there was obviously no policeman around, and there certainly would have been no  46  in going through it. Much later that night, after I  47  a group of my friends in Lewisburg and climbed into bed near midnight, the question of why I’d stopped for that light  48  me, I think I stopped because it’s part of a contract(合同) we all have with each other. It’s not only the  49  , but it’s an arrangement we have, and we trust each other to  50  it: we don’t go through red lights. Like most of us, I’m more likely to be  51  from doing something bad by the social convention that  52  it than by any law against it. It’s amazing that we ever  53  each other to do the right thing, isn’t it? And we do, too, Trust is our  54  preference. I was so  55  of myself for stopping for the red light that night. A. flight         B. distance             C. road                 D. length A. thinking        B. driving              C. complaining          D. running A. stopped       B. changed         C. stuck                D. lost A. horror         B. strength             C. understanding        D. impatience A. ran off            B. came to              C. passed by            D. left behind A. passed          B. watched              C. approached           D. found A. stop          B. change               C. turn                 D. die A. way             B. side                 C. city                 D. direction A. wondering     B. suspecting           C. struggling           D. regretting A. abused          B. fined                C. injured              D. killed A. danger        B. sign                 C. time                 D. record A. met with           B. got over             C. got rid of           D. called back A. turned out to      B. came back to       C. referred to            D. occurred to A. virtue             B. suggestion         C. law                D. order A. honor         B. solve                C. break                D. judge A. stopped        B. protected            C. rejected             D. frightened A. speaks of       B. stands by          C. takes in             D. disapproves of A. suspect            B. trust                C. teach                D. care A. only           B. first                 C. lucky                D. living A. sorry              B. doubtful             C. sure                 D. proud