[单项选择]The （）family in Chinese cities now spends more money on housing than before.
A. normal
B. average
C. usual
D. general

[单项选择]The（）family in Chinese cities now spends more money on housing than before.
A. normal
B. average
C. usual
D. general

[单项选择]The_______family in Chinese cities now spends more money on housing than before.
A. normal
B. average
C. usual
D. general

[填空题]In the past, many cities did more trade within their own country than with overseas ports.

[单项选择]Nowadays, cities are becoming more and more crowded. Some pessimists (悲观者)are deeply worried about the serious problems caused by the huge populations. They believe that the public services are already overloaded and near the verge of collapse. Especially in some developing countries, the metropolis(大城市) are overcrowded all the time. Crowded streets, stuffed buses and jammed subways continuously affect people’s lives. Some optimists, however, see the current problems as merely part of an evolutionary process. They argue that London and New York had similar problems but were able eventually to establish an orderly and safe environment for their citizens. It seems that people become the controversial factor here. Either they themselves as inhabitants cause inconvenience to each other, or they participate together in city developing plans and contribute efforts to facilitate city life. Human elements are therefore the center for determining the future of big cities.
According to the pa
A. pollution
B. noise
C. population
D. traffic jam

[单项选择]

The average young American now spends practically every waking minute—except for the time in school, though reluctantly—using a smart phone, computer, television or other electronic devices, according to a new study.
Those ages 8 to 18 spend seven and a half hours a day with such devices, compared with less than six and a half hours five years ago. And that does not count the hour and a half that youths spend texting, or the half hour they talk on their cellphones. And because so many of them are multitasking—say, surfing the Internet while listening to music—they pack on average nearly 11 hours of media content into that seven and a half hours.
The study’s findings shocked its authors, who had concluded in 2005 that use could not possibly grow further, and confirmed the fears of many parents whose children are constantly tethered to media devices. ^① It found, moreover, that heavy media use is associated with several negati
A. prevailing 
B. obvious 
C. notorious 
D. disastrous