2. 外语
  3. During recent years we have heard much about "race": how this race does certain things and that race believes certain things and

During recent years we have heard much about "race": how this race does certain things and that race believes certain things and

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问题      During recent years we have heard much about "race": how this race does certain things and that race believes certain things and so on. Yet, the【C1】______ phenomenon of race consists of a few surface indications.
     We judge race usually【C2】______ the coloring of the skin: a white race, a brown race, a yellow race and a black race. But 【C3】______ you were to remove the skin you could not【C4】______ anything about the race to which the individual belonged. There is【C5】______ in physical structure, the brain or the internal organs to 【C6】______ a difference. There are four types of blood. 【C7】______ types are found in every race, and no type is distinct to any race. Human brains are the 【C8】______  . No scientists could examine a brain and tell you the race to which the individual belongs. Brains will【C9】______ in size, but this occurs within every race.【C10】______  does size have anything to do with intelligence. The largest brain【C11】______ examined belonged to a person of weak【C12】______ .On the other hand, some of our most distinguished people have had【C13】______  brains.
     Mental tests which are reasonably【C14】______ show no differences in intelligence between races. High and low test results both can be recorded by different members of any race.【C15】______  equal educational advantages, there will be no difference in average standings, either on account of race or geographical location.
    Individuals of every race【C16】______ civilization to go backward or forward. Training and education can change the response of a group of people,【C17】______ enable them to behave in a/an【C18】______ way. The behavior and ideals of people change according to circumstances, but they can always go back or go on to something new 【C19】______ is better and higher than anything【C20】______ the past.
【C3】
选项 A、since
B、if
C、as
D、while
答案B
解析 根据这里的从句和后面的主句，我们可以看出这里使用的是虚拟语气，故选择证来引导非真实条件从句，例如：If I had answered the policemen seriously，I would not have been arrested．如果我认真地回答了警察的问题，我就不会被逮捕了。If there were no loss of energy by friction，the motion would continue indefinitely．如果没有由于摩擦而使能量丧失，运动将无限期地继续下去
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