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

We judge race usually (2)_____ the coloring of the skin: a white race, a brown race, a yellow race and a black race. But (3)_____ you were to remove the skin you could not (4)_____ anything about the race to which the individual belonged. There is (5)_____ in physical structure, the brain or the internal organs to (6)_____ a difference.

There are four types of blood. (7)_____ types are found in every race, and no type is distinct to any race. Human brains are the (8)_____. No scientists could examine a brain and tell you the race to which the individual belonged. Brains win (9)_____ in size, but this occurs within every race. (10)_____ does size have anything to do with intelligence. The largest brain (11)_____ examined belonged to a person of weak (12)_____. On the other hand, some of our most distinguished people have had (13)_____ brains.

Mental tests which are reasonably (14)_____ show no differences in intelligence between races. High and low test results both can be recorded by different members of any race. (15)_____ equal educational advantages, there will be no difference in average standings, either on account of race or geographical location. Individuals of every race (16)_____ civilization to go backward or forward. Training and education can change the response of groups of people, (17)_____ enable them to behave in a (18)_____ way.

The behavior. and ideals of people change according to circumstances, but they can always go back or go on to something new (19)_____ is better and higher than anything (20)_____ the past.

A．complete

B．full

C．total

D．whole