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大家早上好~！本聽力材料來自于老托partb，partc，是公認實施有效的聽寫材料，對于上手托福時間不長的同學非常適合。我曾經一次短時間備考聽力提高了7分也歸功老托。希望大家和我一樣一定要堅持下來噢。相信堅持學習的同學聽力上都會有很大的飛躍！
Nopain, no gain.我們的安排是這樣的，第一遍用聽力軟件精聽材料（建議做單句聽寫，聽寫的時候不要偷看我給的挖空題），然后按照我給的挖空題填關鍵詞，回復后即可看到聽力原文和文章精解，我將把難點和易錯點oneby one 分析給大家。
回復填空答案格式如下：1____2____3____...et.al.
Human populations near the equator haveevolved dark skin over many generations because of exposure to the fierce raysof the Sun. A similar phenomenon has also occurred in other parts of the animalkingdom. The African grass mouse is a good example. Most mice are______,but the African grass mouse is active during daylight hours. This means that itspends its days searching for food in the semidry bush and______habitats of eastern andsouthern Africa. Its______is______, like a______, which helps it blend in withits environment. Because it spends a lot of time in the intense______sun, the grass mouse has also evolved two separate safeguards against the Sun's______radiation. First, like the populations of humans in this region of the world,the skin of the grass mouse contains lots of______, or dark______. Second, and quite unusual,this mouse has a layer of melanin-pigmented______between its______and skin. This unique "cap" provides an extra measure of protectionfor the grass mouse and three other types of African mouse-like rodents thatare active during the day. The only other species scientists have identifiedwith the same sort of skull adaptation is the white tent-making bat of theCentral American tropics. Although these bats sleep during the day, they do socurled up with their heads exposed to the sun.
