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TGIF！好開心挖，熬了一周終于是周末了~我是AmyLee，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！
No pain, 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one by one 分析給大家。
回復填空答案格式如下：1____2____3____...et.al.
Look at our______map and you'll see that the middle third ofthe North American continent from the Rocky Mountains almost to the Mississippi River is pretty flat. This is the Great Plains.This kind of area is sometimes called a______, sometimes a______. That's s-t-e-p-p-e. The______features are______,______,dry climate, and an absence of trees. The Great Plains are actually the former bed of a shallow inland sea. Over millions of years,______left by______, water, and wind______out the dry sea bed. As I said, the Great Plaints are bordered on the west by the Rocky Mountains. And it's really the Rockies that are responsible for the formation of the grasslands. The mountains are so high that they block the heavy______air traveling eastward form the Pacific Ocean. Lighter, drier air passes overthe mountains. Until people______with irrigation and farms, only grass could grow on the dry,______plain. In fact, we can divide the Great Plains into three zones. In the west, where it's driest and windiest,the grass is very short. In the eastern zone, there's more rain and grass grows as high as 360 centimeters. In the middle third, there's a mix of grass species that grow to an______height.
