北京地区成人本科学士学位英语统一考试（A）Part I Reading Comprehension (30%)Directions: There are three passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center.Passage 1Questions 1 to 5 are based on the following passage:Scientists find that hard-working people live longer than
