This passage shows that Canadians ______.

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．every American cannot have guns B．only soldiers and police can have guns C．every American citizen can own guns D．teachers have no money to buy guns

A．labor resisted a reduction of money-wages, which characterized the depression of the 1930s in the U.S B．labor demanded a real wage, which characterized the depression of 1930s in the U.S C．neither labor refusing to work for a lower money-wage nor demanding a real wage characterize the depression of 1930s in the U.S. D．both A and B 此题为多项选择题。

A．Islamic artists have had to create architectural decorations with images of flowers or geometric forms B．History teachers are more objective than general history C．It is more difficult to study art history than general history D．People and stories from the Bible were painted on churches and other buildings in order to popularize the Bible

A．the sea is very shallow B．the sea is very deep C．the sea is neither shallow nor deep D．the depths(深度)of the sea in different places are quite different

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．Katzenberg will undoubtedly win the lawsuit and get all the money he claimed B．Eisner will remain imperturbable all through the trial C．Katzenberg will suffer great embarrassment D．Disney will face more lawsuits from their employees

A．silliness B．cleverness C．carelessness D．politeness 此题为多项选择题。

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.have monopolized the talk show circuit B.exploit the weaknesses in human nature C.appear at different times of the day D.are targeted at different audiences

A．if the experiments' results can be applied to the practice, the customers will be very likely to buy things according to the ads B．if the Harvard group can succeed in finishing the research, they will use it in attracting more and more and more and more consumers into the market C．the financial supporting corporations such as Coca Cola, General Motors can employ the experiments in their own marketing D．the consumers may discover that those ads will always annoy them by jingling out of their heads and cause them headaches 此题为多项选择题。

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．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．if the experiments' results can be applied to the practice, the customers will be very likely to buy things according to the ads B．if the Harvard group can succeed in finishing the research, they will use it in attracting more and more and more and more consumers into the market C．the financial supporting corporations such as Coca Cola, General Motors can employ the experiments in their own marketing D．the consumers may discover that those ads will always annoy them by jingling out of their heads and cause them headaches 此题为多项选择题。

A．the ultralight plane is mainly used for the amusement B．the ultralight plane can"t develop much C．the ultralight plane has no further use D．the ultralight plane is the same with other kinds of planes

A．the new calendar was established in honor of the Roman God B．the Nile River enriched farmers' fields with silt in March C．we keep on using the new calendar D．the farming cycle lasted for 11 days

A．most people do not get enough exercise B．a high pulse rate is desirable C．regular exercise can strengthen your heart D．everyone should exercise 15 minutes a day

A．education is beneficial to mental development B．education protects the braid from shrinking C．education has a protective effect against mental decline D．education affects overall brain structures

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．do not respect orders. B．do not trust their schools. C．should pick up their children first in case of evacuation. D．will protect their children at all cost.

A．men no longer face dangers when they climb mountains B．only men who lived near mountains climbed mountains long ago C．mountain climbing can be a dangerous sport D．dragons once ate people who tried to climb mountains

A．there is no responsible whalewatching company nowadays. B．swimming and snorkeling with whales in the wild can never become one of the tourist programs even in the future. C．the Tongan Government will revise its guidelines to allow boats to come within 10 meters rather than 30 meters of a whale. D．You won't be able to get money back if you can't swim with a whale successfully. 此题为多项选择题。

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.