The author' s main purpose in the second paragraph is to______．

A . A. To give practical instruction for pruning a tree. B . B. To give a general description of pruning. C . C. To explain how trees develop diseases. D . D. To discuss different methods of pruning.

A．To change the behavior. or the thinking of its readers towards body-image. B．To convince people that it is harmful to be obsessed with superficial beauty. C．To persuade people to pursue more valuable things. D．To analyze why people pay so much attention to physical appearance.

A．explain how cold viruses are transmitted B．prove that a poor diet causes colds C．discuss the relationship between income and frequency of colds D．analyze the distribution of income among the people in the study

A．To inform. people the severity of the millennium bug. B．To accuse some comes for being inactive. C．To advise people to abandon the computers. D．To tell the readers the way to solve the millennium bug problem.

A．compare the consequences of the earthquakes that occurred in the U.S B．encourage civil engineers to make more extensive use of computers C．outline the history of the development of quake-resistant building materials D．report new developments in constructing quake- resistant building 此题为多项选择题。

A) declare their objectives clearly B) give up the use of violence C) continue the dialogue with the scientific community D) help to find those responsible for the attempted murder

A) to stress the impact of the computer on society B) to explain the concept of the computer literacy C) to illustrate the requirements for being competent citizens of tomorrow D) to emphasize that computer programming is an interesting and challenging job

A．To question Beverly Lauds opinions about spanking. B．To explain why parents should spank their kids. C．To compare two different views on spanking. D．To show the harmful effects of spanking.

A．to compare dog behaviors to chimp behavior B．to defend an idea C．to explore recent research on nonhuman self-awareness D．to evaluate a hypothesis 此题为多项选择题。

A．respond to the need for new schoolbooks B．show the distinct development of the English language in America C．improve spelling forms based upon British models D．influence the pronunciation of the English language

A．to persuade young children not to worry about criticism B．to stress the importance of positive reinforcement to children C．to discuss the skill of combining criticism with encouragement D．to teach young athletes how to avoid burnout

A．compare the consequences of the earthquakes that occurred in the U. S. B．outline the history of the development of quake- resistant building materials C．report new developments in constructing quake - resistant buildings D．encourage civil engineers to make more extensive use of computers

A．point out the role the workaholic plays in the American economy. B．defend people who are addicted to work. C．encourage us not to worry about our imperfection. D．consider the difficulties that confront us at middle-age.

A．business in a free market economy B．business in a socialist economy C．the rights of businesses D．businesses' activities

A．To advise America to learn from its mistakes. B．To tell the readers how to look at WikiLeaks. C．To discuss how to deal with WikiLeaks. D．To show readers how to stick to their rules.

A．To review the impact of women becoming high earners. B．To contemplate the philosophy underlying individualism. C．To examine the trend of young people living alone. D．To stress the rebuilding of personal relationships.

A．warn people not to celebrate Halloween any more B．criticize the Halloween celebration activities C．tell people to be careful in deciding whether to celebrate Halloween D．promote the tradition of Halloween and its celebrations

A．to indicate the way genetic testing works. B．to show the power of one's genetic makeup. C．to introduce genetic testing and its function. D．to reveal the influence of the environment on genes.

A．geography of the Pacific Ocean B．commercial role of the Pacific Ocean C．its origin of the name D．general introduction of the Pacific Ocean

A．To show the inability of trains to compete with planes with respect to speed and convenience. B．To stress the influence of the automobile on America' s standard of convenience. C．To emphasize the function of travel agencies in market promotion. D．To illustrate the important role of persuasive communication in changing consumer attitudes.