The purpose of this passage is ____（）

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．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. to describe how American children spend their summer. B. to explain the needs of the modern working families. C. to discuss the problems of the current school calendar. D. to persuade parents to stay at home to look after their kids.

A．describe the harmful air pollution B．explain the way to prevent air pollution C．show the worries about the air pollution D．recommend a method to avoid air pollution

A．To tell the reader that the use of cell phones is as bad as smoking. B．To call for a ban on the use of cell phones in the public. C．To emphasize the immoral effect of the cell phone on our consciousness. D．To draw public attention to the problems caused by the use of cell phones. 此题为多项选择题。

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 tell readers that horse appeared earlier than human being. B．To inform. us that horses can help us a lot. C．To introduce the history and characteristics of horses. D．To introduce the primitive horses to modern man.

A．explain why people have emotions B．show how people avoid the negative emotions C．explain what people should do before emotions D．define anti classify people's emotions

A．the contributions of household incomes to happiness B．the complex relationship between money and happiness C．the positive relationship between money and happiness D．the negative relations of money to happiness 此题为多项选择题。

A．describe different types of medicine B．argue for the importance of medicine in health care C．show the crucial role religion plays in medical treatment D．compare the educational background of three different types of patients

A．To invite people to take a breath in the Bay of Naples. B．To advise people to telephone Newmarket Air Holidays Ltd. C．To persuade people to tour in the area of the Mediterranean Sea. D．To attract people to go to Sant' Agata or Sorrento for sightseeing.

A．to stress the impact of the computer on society B．to explain the concept of 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 此题为多项选择题。

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．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．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 outline contrasting types of economic system. B．To explain the science of economic systems. C．To argue for the superiority of one economic system. D．To compare barter and money-exchange markets.

A．To remind people of the need of sustainable development. B．To suggest ways of ensuring sustainable food production. C．To advance new criteria for measuring farming progress. D．To urge people to rethink what sustainable agriculture is.

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.

A．Revealing the procedures for foreign adoptions B．Recounting an amazing childhood camping experience C．Investigating how Hidden Valley saves foreign adoption families D．Demonstrating how culture camps help foreign adoption families

A．tell us his own experience in life B．tell us how to find peace of mind C．tell us a happy trip he took with his children D．ask us to see things from both sides

A．To advise that TV should be used for educational purpose B．To describe the harmful effects of TV on children C．To explain traditional views of influences that TV has had on children D．To suggest that television cannot be blamed for problems it doesn't cause