单选题

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.

单选题 According to the passage, ______ causes the most serious problem.

【正确答案】 C

【答案解析】[解析] 根据文中的第二句“Some pessimists are deeply worried about the serious problems caused by the huge populations”得知正确答案为选项C。

单选题 If the pessimists are to give examples, ______ serves as the best one.

【正确答案】 B

【答案解析】[解析] 文中提到悲观者的观点时，举例说“尤其是在发展中国家的大城市更为拥挤”，四个选项中只有B选项属于发展中国家。所以正确答案为选项B。

单选题 "Controversial" has the similar meaning with ______.

单选题 The last sentence implies that ______.

单选题 Why do optimists mention London and New York? ______.

【正确答案】 D

【答案解析】[解析] 文中提到London、New York,是因为一些乐观主义者提出了在一些人口多的大城市完全可以拥有有序和安全的环境。所以正确答案为D选项。