下面是对上世纪三个阶段出生的中学生体质与健康的调研数据，根据要求答题。（5分）
（2）根据你的生活认识，简要说说出现这一现象的原因（不超过20字）。 。（2分） |
（1）（3分）80后、90后中学生，平均身高、体重都较70后增加了，但身体机能综合素质却下降了。（意思相近即可）（2）（2分）生活条件好了（营养好了），但身体锻炼少了。（其它理由言之成理酌情给分）
题目分析：此题为表文转述题。具体解答时要仔细比较纵栏与横栏的内容，然后筛选整合。解答第一问时要把握三个“比较”：出生类别、身高体重、机能综合素质。解答第二问时要注意被字数的限制。
| 完形填空。 | |||
| Tom __1__ a very good student, and he __2__ doing homework, because he liked __3__ other things in his free time. Usually he didn’t do __4__ homework, and when he did it, he always made __5__ mistakes. Then one day, his maths teacher looked __6__ Tom’s homework and found that he had done __7__ right. He was very happy and very surprised. He asked Tom to his desk and __8__ to him, "You have done all your homework right this time, Tom. __9__ your father help you?" Usually Tom’s father did help him with his homework, but this time he didn’t, because he was not at home. Tom answered, "No, sir. He was busy last night, so I had to do it all _10__ myself." | |||
| ( )1. A. am not ( )2. A. doesn’t ( )3. A. do ( )4. A. his ( )5. A. a lot ( )6. A. up ( )7. A. all his homeworks ( )8. A. say ( )9. A. Did ( )10. A. to | B. was not B. don’t like B. does B. him B. much B. at B. all homeworks B. says B. did B. by | C. were not C. didn’t like C. did C. he C. any C. after C. all his homework C. said C. Was C. for | D. are not D. didn’t D. to do D. her D. a lot of D. for D. all the homework D. saying D. Were D. at |