托福TPO34综合写作（阅读+听力文本）|上海新航道

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托福TPO34综合写作（阅读+听力文本）

2017/4/17 14:53:25来源：新航道作者：新航道

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摘要：上海新航道托福小编为托福考生们准备了托福综合写作TPO34,希望各位考生们在TPO写作真题里能够得到锻炼，祝广大托福考生能够取得理想成绩。

上海新航道托福小编为托福考生们准备了托福综合写作TPO34,希望各位考生们在TPO写作真题里能够得到锻炼，祝广大托福考生能够取得理想成绩。

Reading

A huge marine mammal known as Steller’s sea cow once lived in the waters around Bering Island off the coast of Siberia. It was described in 1741 by Georg W. Steller, a naturalist who was among the first European to see one. In 1768 the animal became extinct. The reasons for the extinction are not clear. Here are three theories about the main cause of the extinction.

First, the sea cows may have been overhunted by groups of native Siberian people. If this theory is correct, then the sea cow population would have originally been quite large, but hundreds of years off too much hunting by the native people diminished the number of sea cows. Sea cows were a good source of food in a harsh environment, so overhunting by native people could have been the main cause of extinction.

Second, the sea cow population may have become extinct because of ecosystems disturbances that caused a decline in their main source of food, kelp (a type of sea plant). Kelp populations respond negatively to a number of ecological changes. It is possible that ecological changes near Bering island some time before 1768 caused a decrease of the kelp that the sea cows depend on.

Third, the main cause of extinction of the sea cows could have been European fur traders who came to the island after 1741. It is recorded that the fur traders caught the last sea cow in 1768. It thus seems reasonable to believe that hunting by European fur traders, who possessed weapons that allowed them to quickly kill a large number of the animals, was the main cause of the sea cow’s extinction.

托福TPO34独立写作题目

Do you agree or disagree with the following statement?

Educating children is a more difficult task today than it was in the past because they spend so much time on cell phone, online games, and social networking Web site.

Use specific reasons and examples to support your answer.

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