This does not mean that all people are less intelligent in summer than they are during the rest of the year.It does mean,however,that the mental abilities of lrge numbers of people tend to be lowest in summe Spring appears to be the beat period of the year for thinking.One reason may be that in th spring man's mental abilities are affected by the same factors that bring about great changes in all nature Fall is the next-best season,then winter.As for summer,it scems to be a good time to take a 31.According to the passage,man's intelligence A)Varies from day to day B)Stays the same throughout the year C)Changes with the seasons D)Cha lwthedtcmae and emperature have A)some effect on a few people's intelligence B)a great effect on everyone's intelligence C)some effect on most people's intelligence D)no effect on most people's intelliger 33.Ells ntington' A)variations of his own mental abilities from season to season B)the results of research done by him and other scientists among peoples in different climates c)detailed records of temperature changes in different places ds of diff ys or thinking am nong peoples on different climate 34.Why does the author say summer is a good time to take a long vacation from thinking? A)Because a long vacation in summer helps to improve people's mental power. B)Because people tend to be less creative during summer. C)Because summer is a good time for outdoor activities D)Because mental exertion in the summer heat taxest much of people's energy A)man's mental abilities change from season to season B)man's intelligence varies from place to place C)man should take a long vacation in summer D)if you want to do creative thinking.go toa cool place Pas age Fou Questions 36 to 40 are ba ed on the following pas The United Sta vers a lar part ican continent. Its neighbors ar the larg Although th States is a big country,it isno e a nati from Eng吗 and it hac en state. on the ag by a star.Al I thes part of nd new red on the flag.For a long tir ge ther rs.n1959. owever,two were added t th of Alaska and hawai This does not mean that all people are less intelligent in 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 summer. Spring appears to be the beat period of the year for thinking. One reason may be that in the spring man’s mental abilities are affected by the same factors that bring about great changes in all 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 31. According to the passage, man’s intelligence_________- A) Varies from day to day B) Stays the same throughout the year C) Changes with the seasons D) Changes from year to year 32. Ellsworth Huntington decided that climate and temperature have________ A) some effect on a few people’s intelligence B) a great effect on everyone’s intelligence C) some effect on most people’s intelligence D) no effect on most people’s intelligence 33. Ellsworth Huntington’s conclusion was based on____- A) variations of his own mental abilities from season to season B) the results of research done by him and other scientists among peoples in different climates C) detailed records of temperature changes in different places D) detailed records of different ways of thinking among peoples on different climates 34. Why does the author say summer is a good time to take a long vacation from thinking? ____ A) Because a long vacation in summer helps to improve people’s mental power. B) Because people tend to be less creative during summer. C) Because summer is a good time for outdoor activities D) Because mental exertion in the summer heat taxes too much of people’s energy. 35. The central idea of this passage is______ A) man’s mental abilities change from season to season B) man’s intelligence varies from place to place C) man should take a long vacation in summer D) if you want to do creative thinking, go to a cool place Passage Four Questions 36 to 40 are based on the following passage. The United States covers a large part of the North American continent. Its neighbors are Canada to the north and Mexico to the south. Although the United States is a big country, it is not the largest in the world. In 2000, its population was over 222 million. When this land first became a nation, after winning its independence from England, it had thirteen states. Each of the states was represented (代表) on the American flag by a star. All these states were in the eastern part of the continent. As the nation grew toward the west, new states were added and new stars appeared on the flag. For a long time, there were 48 stars. In 1959, however, two more stars were added to the flag, representing the new states of Alaska and Hawaii