[单项选择]The author stresses that our natural abilities are ______.

[单项选择]The author considers our understanding of dreaming someday ______.
A. imaginary
B. likely
C. suspicious
D. inevitable

[单项选择]

The destruction of our natural resources and contamination of our food supply continue to occur, largely be- cause of the extreme difficulty in affixing (把……固定) legal responsibility on those who continue to treat our environment with reckless abandon (放任). Attempts to prevent pollution by legislation, economic incentives and friendly persuasion have been met by lawsuits, personal and industrial denial and long delays -- not only in accepting responsibility, but more importantly, in doing something about it.
It seems that only when government decides it can afford tax incentives or production sacrifices is there any initiative for change. Where is industry’s and our recognition that protecting mankind’s great treasure is the single most important responsibility If ever there will be time for environmental health professionals to come to the front- lines and provide leadership to solve environmental problems, hat time is now.
We are being
A. they are unaware of the consequences of what they are doing
B. they are reluctant to sacrifice their own economic interests
C. time has not yet come for them to put due emphasis on it
D. it is difficult for them to take effective measures

[单项选择]The author believes that our knowledge of social systems is more secure than that of physical system because ______.
A. it is not based on personal experience
B. new discoveries are less likely to occur in social sciences
C. it is based on a fairly representative quantity of data
D. the records of social systems are more reliable

[单项选择]We are using up our natural resources too quickly and at the same time we are ______our environment with dangerous chemicals.
A. protecting
B. saving
C. polluting
D. fighting

[单项选择]When the author says that we should intensify our efforts in nutrition education among our young people, he means that we should ______.
A. force young people to eat well-balanced meals
B. tell young people to eat liver , chicken, beef ,or veal
C. teach adolescents about nutrition in home economics class
D. try to change eating habits to get enough iron and other essential nutrients

[单项选择]According to the author, we should reverse our classification of the physical sciences as "hard" and the social sciences as "soft" because ______.
A. a reverse ordering will help promote the development of the physical sciences
B. our knowledge of physical systems is more reliable than that of social systems
C. our understanding of the social systems is approximately correct
D. We are better able to investigate social phenomena than physical phenomena

[单项选择]The author believes that a study of our dime novels ______.
A. is a waste of time
B. would be sufficient in itself to determine the essential characteristics of the American tradition
C. would be a valuable contribution in determining the essential characteristics of the American tradition
D. would be amusing but unimportant

[单项选择]The author believes that the right side of our brain is as important as the left side because ______.
A. it controls our appreciation of music and sense of rhythm
B. it enables us to make scientific discoveries
C. it is more important to analyze and organize in order to survive
D. the imaginations may provide solutions to problems and enable us to enjoy emotional and artistic experiences

[单项选择]What does the author mean by "Our hats off to you, Susan!"
A. We give our hats to Susan.
B. We take off our hats to Susan.
C. We give our congratulations to Susan.
D. We show Susan our hats.

[单项选择]In the eyes of the author, to defend our own beliefs is ______.
A. mistaken
B. natural
C. rational
D. necessary