【正确答案】
B
【答案解析】[听力原文]29-31
In many societies women ere not treated as the equals of men. In some societies women must always obey the men in their lives. Other societies deny women basic equality in education, in employment, and politics. For example, in Liechtenstein, a small country in Western Europe, woman still do not have the right to vote. In the U.S. discrimination against women perhaps is not as clear as it is in some other parts of the world, but it exists. In 1971, for example, 90% of elementary school teachers were women. However, 80% of elementary school principals were men. In the same year only 7% of American doctors were women,
In the late 1960s, women's organizations began to demand an end to sex discrimination. They were quite successful Today there are a number of laws that protect the fights of women. The women's organizations are also trying to change people's ideas about woman and about their place in society. This is a very difficult goal. New laws can perhaps change people's behavior, but they cannot always change people's ideas. As a result, the changes in ideas are slower; however, there is evidence that they are taking place.
29. What does the speaker want to prove by giving the number of female elementary school teachers and principals?
短文中叙述到“…90% of elementary school teachers were women．However，80%of elementary school principals were men．”表明性别歧视在美国仍然存在，如若不然妇女应执掌小学校长的大权，由此可知选项B为正确选择．