【正确答案】 A

【答案解析】[听力原文]32-35
A team of scientists recently began a project to measure the effects of loud noises on sea animals. If the sounds don't harm the animals, then the researchers can go ahead with a plan to transmit sound waves (32) through the Pacific Ocean to take the earth's temperature. Sound travels faster through warm water than cold water. By analyzing the speed of sound through the ocean over time, the scientists will be able to determine if cur planet is warming up. The experiment was nearly cancelled more than a year ago because environmental groups (33) fear that the sound will con. fuse or harm sea-animals. So scientists are conducting tests on the animals first. The researchers lowered a loud speaker that emits low frequency sound about 1,000 meters beneath the ocean. Scientists at the site transmit sound waves into the ocean. Radio transmitters attached to some of the sea animals help the researchers (34) keep track of the animals' movements. If sea-animals are distressed by the sounds, they would swim away from the speakers. So far, there aren't any signs that the animals are being harmed. Researchers at the site noticed that (35) large numbers of sea-animals swim near the speaker whether it was turned on or off, but it is still too soon to know for sure, the scientists admit. The test will continue through September. "If all goes well," they say, "we can begin measuring temperature changes on our planet."
32．What is the purpose of analyzing the speed of sound through the Pacific Ocean?

[解析] 通过预读选项the Earth's temperature, the ocean可知，短文与地球环境有关。在短文开篇to take the earth's temperature，与答案A)符合。

【正确答案】 C

【答案解析】[听力原文]
Why was the experiment nearly cancelled?

[解析] 通过预读选项the fear可知，题目与担心某事发生的原因有关。短文随后提出，fear that the sound will confuse or harm sea-animals提出实验被取消是因为担心声音惊扰或损害海洋动物。故答案为 C)。

【正确答案】 C

【答案解析】[听力原文]
Far what purpose were radio transmitter used?

[解析] 通过预读选项sea animals, testing site可知，题目与检测海洋动物有关。keep track of the animals' movements．(跟踪海洋动物)，故答案与C)符合。

【正确答案】 D

【答案解析】[听力原文]
What was the reaction of the sea-animals in the sound tests?

[解析] 通过预读选项frightened，distressed，swam away可知，题目与海洋动物对实验的反应有关，短文最后部分large numbers of sea-animals swim near the speaker说明海洋动物并不害怕，故答案为D)。