In this passage, “out of sight and out of mind” （Lines 2-3, Para. 3） probably means ________.

A．most marketable pearls are cultured because nature does not produce enough of its own to satisfy the market B．cultured pearls are of a higher quality than natural pearls C．there are two major methods of pearl-making D．a natural "drought" of pearl production is taking place

A．You should not learn grammar only. B．You should ignore the rules of pronunciation. C．You should learn a language by making mistakes. D．You should learn a language at school.

A．admired for his trickery B．no match for the lion C．pitied for his trick D．considered worthless

A．Some runners looked like Elvis Presley. B．Some runners were ready to put out a fire. C．Some runners were participating in a wedding. D．Some runners were serious about winning.

A．Approving. B．Criticizing. C．Ironical. D．Neutral.

A．The writing of a composition. B．The finding of materials. C．The writing of a research paper. D．The writing of an essay.

A．The trainer team buys dogs in large cities B．The trainer team accepts dogs given by some citizens C．The trainer team raises dogs all by themselves instead of buying them D．The trainer team buys dogs suitable for training

A. unable to have good manners B. unable to express freely or relax C. able to act properly D. able to talk freely

A．sympathetic B．doubtful C．critical D．objective

A．many Americans are very practical when they search for a spouse B．American 20-somethings have a largely romantic view of marriage C．Romantic view of marriage might lead marriage to a happy ending D．Americans are fond of marriage life so they will not care cohabitation

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．Big cities are better than small cities. B．Big cities are exciting places to live in. C．Big cities have a lot of serious problems.

A．Both journal articles and conference papers are reported in a brief and informative way. B．All the theses or dissertations and conference papers are reported in spoken languages. C．Both the journal articles and conference papers are influenced greatly by the intended receivers. D．The various formats of research reports may be presented in different ways. 此题为多项选择题。

A．mothers have the practice to go to work B．working mothers have no time to stay with their children at home C．young wage-earners are economically independent D．mother's position in a family has been raised

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．farming B．leather only C．natural balance D．man's need

A．How to avoid car crash. B．How to educate children properly. C．How to design safer baby equipment. D．How to properly secure children in the car.

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．Depressed. B．Optimistic. C．Opposing. D．Negative.

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．understood B．wrote C．created D．proved