During recent years, we have heard much about "race": how this race does certain things an

We judge race usually【B2】the coloring of the skin: a white race, a brown race, a yellow race and a black race. But【B3】you were to remove the skin, you could not tell anything about the race【B4】which the individual belonged. There is【B5】in physical structure, the brain or the internal organs to【B6】a difference.

There are four types of blood.【B7】types are found in every race, and no type is distinct to any race. Human brains are the【B8】. No scientists could examine a brain and tell you the race to which the individual belonged. Brains will【B9】in size, but this occurs within every race.【B10】does size have anything to do with intelligence. The largest brain【B11】examined belonged to a person of weak【B12】. On the other hand, some of our most distinguished people have had【B13】brains.

Mental tests which are reasonably【B14】show no differences in intelligence between races. High and low test results both can be recorded by different members of any race,【B15】equal educational experience, there will be no difference in average intelligence, either on account of race or geographical location.

Individuals of every race【B16】civilization to go backward or forward. Training and education can change the response of a group of people,【B17】enable them to behave in a【B18】way.

The behavior. and ideals of people change according to circumstances, but they can always go back or go on to something new【B19】is better and higher than anything【B20】the past.

【B1】

A．consists of

B．is consisted of

C．consisted of

D．consist of