英语四级考试的完形填空练习题

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 __61__ phenomenon of race consists of a few surface indications.

We judge race usually __62__ the colouring of the skin: a white race, a brown race, a yellow race and a black race. But __63__ you were to remove the skin you could not __64__ anything about the race to which the individual belonged. There is __65__ in physical structure, the brain or the internal organs to __66__ a difference.

There are four types of blood. __67__ types are found in every race, and no type is distinct to any race. Human brains are the __68__. No scientists could examine a brain and tell you the race to which the individual belonged. Brains will __69__ in size, but this occurs within every race. __70__ does size have anything to do with intelligence. The largest brain __71__ examined belonged to a person of weak __72__. On the other hand, some of our most distinguished, people have had __73__ brains.

Mental tests which are reasonably __74__ show no differences in intelligence between races. High and low test results both can be recorded by different members of any race. __75__ equal educational advantages, there will be no difference in average standings, either on account of race or geographical location.

Individuals of every race __76__ civilization to go backward or forward. Training and education can change the response of a group of people __77__ enable them to behave in a __78__ way.