12 月大学英语四级真题阅读完型词汇作文部分大学英语四级六级考试Part II Reading Comprehension (35 minutes) ,Directions: There are 4 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 centre
,Passage One ,Questions 21 to 25 are based on the following passage
,I'm usually fairly skeptical about any research that concludes that people are either happier or unhappier or more or less certain of themselves than they were 50 years ago
While any of these statements might be true, they are practically impossible to prove scientifically
Still, I was struck by a report which concluded that today�