This passage is mainly about

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．the new concept of management B．the great shift of management style C．the qualities of managers for the 21 st century D．the technique of managers modem management

A．many animals die during hibernation B．hibernation protects animals during the wintertime C．scientists feel puzzled about hibernation D．some bats hibernate and others do not

A.The price of Beijing's office space rises higher B.Different costs of office space all over the world C.The cost of Beijing's office space ranks the top D.Air pollution doesn't influence Beijing's office space

A．Men's way of buying things. B．Women's attitude towards shop assistants. C．The difference between men and women in buying things. D．Men are better in choosing what they will buy.

A．children should be encouraged to draw freely B．children should follow their parents' examples C．parents should know how to cultivate their kids' creativity D．most parents teach their kids confidently and instructively

A. the use of man-made materials has had harmful effects on the modern civilization B. pollution has become a more and more serious problem that is threatening the survival of humanity C. our technological achievements have grown very rapidly in the last twenty years D. we should not make increasing industrialization our chief aim

A．Fire can help people in many ways. B．Fire can be both helpful and dangerous. C．Fire can burn things and people. D．We must be careful with matches.

A．fall guy B．take the rap C．bum rap D．take the blame

A．differences of temperaments of the five writers B．What is the center of the cosmos C．the common concepts of the five writers D．some briefs concerning the relationship between humanism and democracy 此题为多项选择题。

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．employers are checking more closely on applicants now B．lying about college degrees has become a widespread problem C．college degrees can now be purchased easily D．employers are no longer interested in college degrees

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．why we misunderstand what people say B．how to behave when we listen to others C．why we sometimes go wrong with our friends or enemies D．how to avoid mistakes when we communicate with people

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．people in the business of fast-food. B．people against fast-food. C．the heavy users of fast-food. D．fast-food consumers.

A．human brains differ considerably. B．the brain a person is born with is important in determining his intelligence. C．environment is crucial in determining a person's intelligence. D．persons having identical brains will have roughly the same intelligence.

A) better use of greenspace facilities should be made so as to improve the quality of our life B) attention must be directed to the improvement of recreative possibilities C) the urban environment is providing more recreation activities than it did many years ago D) priority must be given to the development of obligatory activities

A．introduce the institutions in higher education B．evaluate the institutions in higher education C．clarify the institution terms in higher education D．classify the institutions in higher education