第三部分阅读理解（共两节，有16小题，满分32分）
第一节：阅读下面短文并做每篇后面的题目。从A、B、C、D四个选项中，选出能回答所提问题或完成所给句子的最佳答案。（本节有11小题；每小题2分，共22分）
A quarrel at home may result in you falling ill. Don’t laugh, it’s true. Family matters including living habits and even the way we speak have a big effect on our health, doctors say.
Wang Xiaoyu, a Senior 2 girl from Xichang, Sichuan Province, fainted (晕倒) in class when she heard her classmates quarrel at the top of their voices. Quarrels between her parents also put the girl into a coma. It is because she is suffering from depression (抑郁症), caused by bad relations at home, doctors explained.
“We don’t get sick or stay well by ourselves,” says Dr Robert Ferrer from the US. Ferrer shows that family forces may explain up to a quarter of health problems, in his recent research.
The genes you get from your family may cause illness. If one of your parents has a heart attack, your risk of being affected may double. But effects on health are not only written in our DNA.
Unrelated people who live under the same roof also get similar problems. Diet, lifestyle and environment affect our health, too.
Ferrer’s research also found that if teenagers feel they are ignored or unimportant at home they are more likely to get sick.
We may never fully understand all the effects that families have on our health. But just as individual (个别的) problems can have effects on others, a small improvement can have big benefits, Ferrer said.
45. Which of the following can best explain why Wang Xiaoyu fainted in class?
A. Because her classmates often quarreled in class.
B. Because her parents used to quarrel.
C. Because of her depression caused by bad family relations.
D. Because her classmates shouted loudly at her.
46. According to Dr Ferrer, which of the following statements is TRUE?
A. We get sick or stay well by ourselves.
B. Only the genes we get from our family have a big effect on our health.
C. Our health has nothing to do with diet, lifestyle and environment.
D. Teenagers who are ignored at home get sick more easily than those who are not.
47. The best title for this passage is ________.
A. Family relations. B. The reasons why we get sick.
C. Happy family makes you healthy. D. A research about teenagers’ health.