A subject which seems to have been insufficientlystudied by doctors and psychologists is the influence of geography and climate on the psychological and physical health of mankind.There seems no doubt that the general character of the landscape, the relative length of day and night, and the climate must all play a big part in determining what kind of people we are.
Moreover, we can all generalize about types of people we have met. Those living in countries .with long dark winters are apt to be less talkative and less vivacious than inhabitants of countries where the climate is more equable. And where the olive and the orange grow, there the inhabitants are cheerful, talkative, and spontaneous.
We are not yet sure of the answers to such .questions, but let us hope that something of benefit to mankind may eventually result from such studies.
A.substances which act positively or negatively on mans health.
C.substances which help provide breeding places for pests.
正确答案:A
2.The inhabitants who live in the areas with long dark winters are likely to be
B.energetic.
D.cheerful.
解析:问题问的是：居住在拥有漫长黑暗冬季的地区的人们可能会怎样?第三段提到与其他地区的人们相比，他们不善言谈，不活跃，因此选择C。
A.health condition.
C.life-span.
正确答案:B
4.According to the author, research into the influence of geography and climate should
B.be performed on a larger scale.
D.go much deeper.
解析:问题问的是：作者认为关于地理和气候的研究应该怎样?从第四段第一句should be studied in depth可知我们应该深入研究这一学科。
A.identify types of people better.
C.get access to an insight into its influence on mankind.
正确答案:C