【正文】 stored in very large tanks is always safe第十一篇答案：DBABC第十二篇： What we know of prenatal development makes all this attempt made by a mother to mold the character of her unborn child by studying poetry， art， or mathematics during pregnancy seem utterly impossible. How could such extremely plex influences pass from the mother to the child？ There is no connection between their nervous systems. Even the blood vessels of mother and child do not join directly. An emotional shock to the mother will affect her child， because it changes the activity of her glands and so the chemistry her blood. Any chemical change in the mother‘s blood will affect the child for better or worse. But we can not see how a looking for mathematics or poetic genius can be dissolved in blood and produce a similar liking or genius in the child. As for musical ability， it may be that what is inherited is an especially sensitive ear， a peculiar structure of the hands or the vocal organs connections between nerves and muscles that make it paratively easy to learn the movements a musician must execute， and particularly vigorous emotions. If these factors are all organized around music， the child may bee a musician. The same factors， in other circumstance might be organized about some other center of interest. The rich emotional equipment might find expression in poetry. The capable fingers might develop skill in surgery. It is not the knowledge of music that is inherited， then nor even the love of it， but a certain bodily structure that makes it paratively easy to acquire musical knowledge and skill. Whether that ability shall be directed toward music or some other undertaking may be decided entirely by forces in the environment in which a child grows up. A. Some mothers try to influence their unborn children by studying art and other subjects during their pregnancy. C. The blood vessels of mother and child do not join directly. 2. A mother will affect her unborn baby on the condition that ____. B. she has a good knowledge of inheritance D. she sticks to studying A. everything from his mother C. a rather general ability that we call intelligence A. surely bee musician B. mostly bee a poet D. bee a musician on the condition that all these factors are organized around music A. Role of Inheritance. B. An Unborn Child. D. Inherited Talents.第十二篇答案：BACDA第十三篇： The case for college has been accepted without question for more than a generation. All high school graduates ought to go， says conventional wisdom and statistical evidence， because college will help them earn more money， bee “better” people， and learn to be more responsible citizens than those who don‘t go. Some observers say the fault is with the young people themselves—they are spoiled and they are expecting too much. But that is a condemnation of the students as a whole， and doesn‘t explain all campus unhappiness. Others blame the state of the world， and they are partly right. We have been told that young people have to go to college because our economy can’t absorb an army of untrained eighteenyearolds. But disappointed graduates are learning that it can no longer absorb an army of trained twentytwoyearolds， either. to the author， ___. used to have full confidence in higher education. few high school graduates chose to go to college. school graduates who aren‘t suitable for college education. students who aren‘t any better for their higher education. dropout rate of college students seems to go up because___. people are required to join the army. people