单项选择题
Passage One Questions 26 to 29 are based on the passage you have just heard.
A．They scare whales to death. B．They produce too much noise. C．They discharge toxic emissions. D．They endanger lots of water life.
A．It may produce an increasing number of idle youngsters. B．It may affect the quality of higher education in America. C．It may cause many schools to go out of operation. D．It may lead to a lack of properly educated workers.
A．Waterscooter operators’ lack of experience. B．Vacationers’ disregard of water safety rules. C．Overloading of small boats and other craft. D．Carelessness of people beating along the shore.