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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.
题目原文：
讨论wetland里面的鬼火（ will-o'-the-wisp）形成的原因是什么。
听力材料：
1. The plants have no source of internal heating, so whether folding or unfolding suffer the same freezing damage.
2. Even though the plants are folding, they cannot block out all the water and fungal spores only require a few water.
3. Some plants in densely shaded area where no light is reaching still fold their leaves, therefore some other reasons may explain.
阅读材料：
有3个可能的原因。
1. Protection against cold (losing heat).
2. Protection against fungal spores infection, block out water so insects have meanings of fungal infection.
3. Eliminate night time light, in order to track up to the regular time to produce flowers.
