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| 作者：不明 来源：www.pccode.net 整理 发布时间：2007-1-23 10:37:07 发布人：wongrs | |
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4. The teacher said the essays were mostly very good, but ______ of Jane’s and Tom’s there was much room for improvement. A. in caseB. for the sake of C. in orderD. in the case 35. All the tasks ______ ahead of time, they decided to go on holiday for a week. A. had been fulfilledB. were fulfilled C. having been fulfilledD. been fulfilled 36. No one is sure ______ damage the cosmic rays can do to a human being, but scientists feel that brief exposure is probably not very harmful. A. that B. whatC. whetherD. which 37. Someone of us had told Smith about ______ a lecture the following day. A. there beingB. there be C. there would beD. there was 38. One investigation showed that forty percent of those killed in auto accidents ______ if they had been wearing seat belt. A. would have been savedB. could have been saved C. should have been savedD. might have been saved 39. The pressure of a gas plays ______ important a part than that of a liquid. A. no lessB. none lessC. none the lessD. not the less 40. Many a time ______ me good advice, but I refused to follow it. A. my teacher has givenB. has my teacher given C. my teacher had givenD. had my teacher given Section III: Cloze (5 points) Directions: For each numbered blank in the following passage, there are four choices marked A, B, C, and D. Choose the best one and mark your answer on the ANSWER SHEET 1. Energy equals mass times the speed of light squared. This is the famous equation of Albert Einstein. It 41 to the category of the theory of relativity, and it equates energy with mass. All things are made up of atoms. When 42 of an atom travels at almost the speed of light, and we put more energy into it to 43 the speed, it begins to increase in mass. The energy that makes it travel fast cannot make it travel beyond the speed of light—nothing 44 light can travel that fast—so the energy goes into the thing itself and increases its mass. Energy 45 into mass. Why is the theory called the theory of relativity? A thing that is relative depends upon something else to identify it or to define it. In relativity theory we identify or define mass, time, and length 46 to the speed of light. When something is at rest, it looks ordinary in length. However, when it travels at almost the speed of light, it becomes 47 . Time also changes. Howev
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