[单项选择]The experts' study on the problem of erosion can ______.
A. lead to its eventual solution
B. provide an effective way to slow it down
C. help to prevent it from worsening
D. warn people whose homes are in danger

[单项选择]The experts' study on the problem of erosion can ______
A. warn people whose homes are in danger
B. provide an effective way to slow it down
C. help to prevent it from worsening
D. lead to its eventual solution

[单项选择]Complicated as seems the problem, it can be solved in only ten minutes with an electronic computer.
A. 尽管这个问题看起来很复杂，但它只能用计算机在十分钟之内解决。
B. 虽然问题似乎很复杂，但用计算机十分钟就能解决。
C. 因为这个问题很复杂，用计算机解决它需十分钟。
D. 用计算机解决复杂的问题只需十分钟。

[单项选择]The author's attitude toward Saccheri's study can be best described as one of
A. (A) qualified approval
B. (B) tempered suspicion
C. (C) mild disdain
D. (D) enthusiasm and optimism
E. (E) neutrality and disinterest

[单项选择]Any problem you can solve with a check is not a problem. It is a(n)______.
A. price
B. expense
C. money
D. annoyance

[单项选择]From Dr. Dustan's study we can infer that

[单项选择]Learning to cope with a health problem can contribute to a better life.
A. 学会预防健康问题的出现可使生活更美好。
B. 为过上更好的生活．我们必须学会预防健康问题的出现。
C. 学会应对健康问题可使生活更加美好。
D. 学会预防健康问题的出现是对生活的一大贡献。

[单项选择]A major problem with most adolescents who can read is ______.
A. their fondness of music and TV programs
B. their ignorance of various forms of art and literature
C. their lack of attentiveness and basic understanding
D. their inability to focus on conflicting input

[单项选择]The best solution to the problem can only be found by a process of trail and
A. mistake
B. error
C. success
D. experiment

[单项选择]

Without proper planning, tourism can cause problems. For ex ample, too many tourists can crowd public places that are also enjoyed by the inhabitants of a country. If tourists create too much traffic, the inhabitants become annoyed and unhappy. They begin to dislike tourists and to treat them impolitely. They forget how much tourism can help the country’s economy. (79)It is important to think about the people of a destination country and how tourism affects them Tourism should help a country keep the customs and beauty that attract tourists. Tourism should also advance the well— being of local inhabitants.
Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to work in the tourism industry. This means that other parts of the country’s economy can suffer.
On the other hand, if there is not enough tourism, people can lose jobs. Businesses can also lose money. It costs a great deal of money to build la
A. an increase of unemployment
B. a decrease in tourist attractions
C. the higher cost of support facilities
D. a rise in price and a fall in pay