[单项选择]Question 1--4 Choose the best answer.
According to the author, travel associations ______.
A. are committed to the protection of natural and cultural resources
B. advocate principles favourable to the development of sound ecotourism
C. made drastic changes in order to address environmental concerns
D. made only a few superficial reforms as a response to environmental concerns

[单项选择]

Choose the best from the following sentences marked A to E to complete the article below.
Most economists in the United States seem captivated by the spell of the free market. (16) . A price that is determined by the seller or, for that matter, established by anyone other than the aggregate of consumers seems pernicious. (17) In fact, price-fixing is normal in all industrialized societies because the industrial system itself provides, as an effortless consequence of its own development, the price-fixing that it requires. Modern industrial planning requires and rewards great size. Hence, a comparatively small number of large firms will be competing for the same group of consumers. That each large firm will act with consideration of its own needs and thus avoid selling its products for more than its competitors charge is commonly recognized by advocates of free-market economic theorie
A. But each large firm will also act with full consideration of the needs that it has in common with the other large firms competing for the same customers
B. Consequently, nothing seems good or normal that does not accord with the requirements of the free market
C. Economists in the United States have hailed the change as a return to the free market. But Soviet firms are no more subject to prices established by a free market over which they exercise little influence than are capitalist firms
D. Accordingly, it requires a major act of will to think of price-fixing (the determination of prices by the seller) as both "normal" and having a valuable economic function
E. Were there something peculiarly efficient about the free market and inefficient about price-fixing-O

[简答题]Choose the best topic sentence from the group below. Write the letter of your choice in the blank provided.A. There are some differences in the behavior of rock and classical music audiences.B. At a rock concert, the audience members yell, whistle, sing along, and even stamp their feet.C. Members of the classical music audience are so highly disciplined that they refrain from even clearing their throats or coughing.D. With rock music, the better the performance, the more active the audience will be; with classical music, the better the performance, the more still the audience will be.Answer:_____________