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Directions: You have 20 minutes to plan and write your response. Your response will be judged on the basis of the quality of your writing and on how well your response presents the points in the lecture and their relationship to the reading passage. Typically, an effective response will be 150 to 225 words.
听力材料：
听力1：they don’t eat in the summer since they are fed in winter with enough, and they are bottom fed, they eat from the sea floor 听力2：The most dangerous parasites are internal, not external, even some domesticated have external parasites. 听力3： The human invasion is accidently, even without the invasion, the fish also jumped.
阅读材料：
Topic: Three possible theories of why sturgeon fish jump into the air. 阅读1：They need to feed themselves by the insects in the air 阅读2：They want to remove the parasites on the scales. 阅读3：They are aggressive when the tourists’ boats invade their territory.
