阅读理解。
     If you are like most people, your intelligence (智力) changes with the seasons, you are probably a lot
  sharper in the spring than you are at any other time of year. A famous scientist, Ellsworth Huntington
 (1876-1947),concluded (总结) that climate and temperature have an effect (作用) on your mental
 abilities(智力).
     He found that cool weather is much more favorable for creative (激活) thinking than summer heat. This
  does not mean that all people are less intelligent in the summer than they are during the rest of the year. It
  does mean, however, that the mental abilities of large numbers of people tend to be lowest in the summer.
    Spring appears to be the best period of the year for thinking. One reason may be that in the spring man's
  mental abilities are affected (受影响) by the same factors (因素) that bring about great changes in
 nature .
     Fall is the next-best season, then winter. As for summer, it seems to be a good time to take a long
  vacation from thinking.
1. Ellsworth Huntington decided that climate and temperature have _____.
    A. a great effect on everyone's intelligence
    B. some effect on most persons' intelligence
    C. some effect on a few persons' intelligence
    D. no effect on most persons' intelligence 
2. Why is spring the best season for thinking? Because _____.
    A. all nature, including man, is growing then
    B. it lasts longer than the other seasons
    C. it is not too warm and not too cold
    D. both B and C
3. The two best seasons for thinking seem to be _____.
    A. spring and fall
    B. winter and summer
    C. summer and spring
    D. fall and winter 
4. Which of the following is wrong?
    A. It seems that the cold of winter is better for thinking than very hot weather.
    B. Perhaps Huntington based (以……为基础) his conclusion (结论) on work with persons in the
         same climate.
    C. Fall is the second best season for thinking.
    D. Both A and C are wrong 
5. The main idea of this passage is that _____.
    A. most people's intelligence changes with seasons
    B. seasons are the reason of the changing intelligence
    C. spring is the best season for thinking
    D. summer is the best season for taking a long vacation