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托福老托精聽第四天~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.
One reason_______analyze the_______on the ocean floor is to seehow long-term changes in Earth's temperature have affected the depth of theocean. By analyzing the remains of sea animals in old layers of ocean sediment,oceanographers can determine the depth of the ocean in the past. They'veanalyzed hundreds of such layers, including some from the coldest periods ofEarth's history—the ice ages. What they've found is that during the ice ages,the amount of water in the oceans decreased. Water levels in the ocean droppedby about four hundred feet. Water from the ocean________and became______ in_______,_______,so it didn't______back into the ocean. When temperatures eventually rose again, the glaciersmelted, and the oceans returned to their former depths. Analysis of sedimentarydata indicates that periods of glacial freezing and melting occurred in regularcycles of twenty thousand, forty thousand, and one hundred thousand years.Oceanographers are interested in the history of seawater levels because theyhope to use this historical data in order to predict the possible effect thatglobal warming could have on seawater levels. If industrial_______are capable of heating global temperatures to the point that glaciers begin tomelt, it is urgent for us to know precisely how high sea levels will rise as aresult.
