单选题 Forget about the spurious benefits of eating shark fin soup, a traditional Asian delicacy that is said to be responsible for the needless destruction of some 73 million sharks a year. In Palau, the first country in the world to proclaim a shark sanctuary, the sharks that frequent the Pacific island country's reefs generate enormous financial benefits. A single reef shark can contribute almost US $ 2 million in its lifetime to the economy of Palau.
The analysis quantified the economic benefits of the shark-diving industry to the Pacific island nation and found that its value far exceeded that of shark fishing. A research focused on hundreds of reef sharks that frequent the five major dive sites in Palau. The study did not take into account the sharks in Palau waters that do not regularly visit the dive sites. Because of their low rates of reproduction and late maturity, shark populations have been driven into a global decline due to fishing. Yet the study shows that these animals on top of the ecosystem can contribute far more as a tourism resource than as a catch target.
Findings from the study, which looked at the reef sharks observed at Palau's major dive sites, include:
The estimated annual value to the tourism industry of an individual reef shark that frequents these sites was US $179, 000, or US $1.9 million over its lifetime.
Shark diving brings approximately US $18 million annually to the Palauan economy, approximately eight percent of the country's gross domestic product.
The annual income in salaries paid by the shark-diving industry was an estimated US $1.2 million; and the annual tax income to Palau generated by shark diving was approximately 14 percent of the country's business tax revenue.
Globally, up to 73 million sharks are killed every year primarily for their fins, which are used in the Asian delicacy shark fin soup. The Pacific Island States have been among the first to recognize the danger of this unsustainable rate of consumption. In 2009, Palan President Johnson Toribiong declared Palauan waters to be a shark sanctuary in his address to the United Nations General Assembly. Since then, the US state of Hawaii, the territories of Guam and the Northern Marianas, and the Republic of the Marshall Islands all banned the possession, sale or distribution of shark fins.
Shark tourism can be a viable economic engine. Overfishing of sharks can have disastrous effects on ocean ecosystems, but this study provides a compelling case that can convince more countries to embrace these animals for their benefit to the ocean and their value to a country's financial well-being.

单选题 By comparison, ______ can generate more economic benefits.
A. shark fishing B. shark eating
C. shark diving D. shark killing

单选题 The message the writer attempts to convey throughout the passage is that______
A. eating shark fin soup is hazardous
B. overfishing of sharks can have disastrous effects on ocean ecosystems
C. more countries should declare their waters to be a shark sanctuary
D. a balanced ecosystem is a win-win situation

单选题 In Palau, shark fishing is______
A. forbidden by the government
B. a traditional practice in fishing industry
C. not a catch target
D. favoured by fishermen

单选题 According to the passage, which of the following statements is NOT true?
A. The research studied the reef sharks in Palau waters.
B. About 73 million sharks are killed every year.
C. Shark fins are Asians' favourite delicacy.
D. The study's finding is convincing.