大学英语六级阅读历年真题训练unit3(A)

paragraph is mainly about         .
A) the teenagers' criticism of their parents
B) misunderstandings between teenagers and their parents
C) the dominance of the parents over their children
D) the teenagers' ability to deal with crises
 
23. Teenagers tend to have strange clothes and hairstyles because they        .
A) want to irritate their parents
B) have a strong desire to be leaders in style and taste
C) have no other way to enjoy themselves better
D) want to show their existence by creating a culture of their own
 
24. Teenagers do not want their parents to approve of whatever they do because they         .
A) have a desire to be independent
B) feel that they are superior in a small way to the adults
C) are not likely to win over the adults
D) have already been accepted into the adult world
 
25. To improve parent-child relationships, teenagers are advised to be           .
A) obedient  
B) responsible                              
C) independent                       
D) co-operative

Questions 26 to 30 are based on the following passage:
 
The long years of food shortage in this country have suddenly given way to apparent abundance. Stores and shops are choked with food. Rationing (定量供应) is virtually suspended, and overseas suppliers have been asked to hold back deliveries. Yet, instead of joy, there is wide-spread uneasiness and confusion. Why do food prices keep on rising, when there seems to be so much more food about? Is the abundance only temporary, or has it come to stay? Does it mean that we need to think less now about producing more food at home? No one knows what to expect.
The recent growth of export surpluses on the world food market has certainly been unexpectedly great, partly because a strange sequence of two successful grain harvests in North America is now being followed by a third. Most of Britain's overseas suppliers of meat, too, are offering more this year and home production has also risen.
But the effect of all this on the food situation in this country has been made worse by a simultaneous rise in food prices, due chiefly to the gradual cutting down of government support for food. The shops are overstocked with food not only because there is more food available, but also because people, frightened by high prices, are buying less of it.
Moreover, the rise in domestic prices has come at a time when world prices have begun to fall, with the result that imported food, with the exception of grain, is ofte

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