单选题 If you are like most people, your intelligence varies from season to season. You are probably a lot sharper in the spring than you are at any other time of the year. A noted scientist, Ellsworth Huntington (1876—1974) concluded from other men"s work and his own among peoples in different climates that climate and temperature have a definite effect on our mental abilities.
He found that cool weather is much more favorable for creative thinking than is 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 a large number 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 spring man"s mental abilities are affected by the same factors that bring about great changes in all nature.
Fall is the nextbest season, then winter. As for summer, it seems to be good time to take a long vacation from thinking.

单选题 According to this passage, your intelligence probably ______.

单选题 Huntington based his conclusions on ______.

【正确答案】 B

【答案解析】第一段第三句说：“一个著名的科学家，埃尔斯沃思·亨廷顿从别人的和自己的对于不同气候下人们的智力情况的研究中得出结论：季节和温度对我们的大脑能力有确定的影响。”由此我们可知，选项B正确，即亨廷顿得出的结论是基于对在不同气候下人们的研究工作。选项A、C、D均与文章内容不符。

单选题 It seems that the cold of winter ______.

【正确答案】 C

【答案解析】第二段第一句说：“他发现对创造性思维来说，凉爽的天气比炎热的夏季更加有利。”由此我们可以推断出：比起炎热的天气，寒冷的冬季似乎更有助于思考。选项A、B、D均与文章内容不符。

单选题 One possible reason why spring is the best season for thinking is that ______.

【正确答案】 A

【答案解析】第三段说：“对思考来说，春天似乎是一年中最好的阶段。其中原因之一也许是在春天里人的大脑能力受带给整个自然巨大变化的同样因素的影响。”我们知道，春天是万物复苏、生长的季节。由此我们可以看出，文中指的自然界的巨大变化是万物生长的意思，因此人也包含在其中。由此可知选项A正确。选项B、C、D均与文章内容不符。

单选题 The two best seasons for thinking seem to be ______.

【正确答案】 A

【答案解析】这是一道综合推理题，应结合文中上下文所提供的信息进行综合判断，找出正确答案。文中第四段说：“秋季是第二好的季节，然后是冬季。至于夏季，它似乎是最好的思考休长假时间。”结合第三段，即作者认为春季是人类大脑能力最强的季节，我们由此可以推出一年中思考的最好季节的由高到低的次序是：春季—秋季—冬季—夏季，因此选项A正确。