TPO21

The lecturer points out three different shortcomings of genetically modified trees. In the aspects of adaptation, economic lucrativeness, and environmental value, they never have overwhelming advantage over natural trees. That means the points made in the reading are partial and biased.

First, genetic modification doesn’t necessarily make a natural tree more resistant to environmental adversities. Although genetic reconstructing may make a species stronger in a specific condition as the reading indicates, the new strain lakes the genetic diversity of a natural species. Thanks to the marginal differences between individuals, there can always be some survivors among natural species following a large

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TPO21

综合写作：

Genetic modifications, a process used to change an organism's genes and hence its characteristics, is now being used to improve trees. Through genetic modification, it is possible to create trees that produce more fruit, grow faster, or withstand adverse conditions. Planning genetically modified trees on a large scale promises to bring a number of benefits.

First, genetically modified trees are designed to be hardier than natural trees; that is, they are more likely to survive than their unmodified counterparts. In Hawaii, for example, a new pest-resistant species of payapa tree has been developed in response to ringshot virus infections that have repeatedly damaged the native papaya-tree population. Planning the genetically modified papayas has largely put an end to the ringshot problem.

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TPO 21 综合写作

李一昂

The reading material states that genetic modification trees bring massive benefits while the professor holds the view that they may lead to several problems and costs. Then, the professor explain his idea from three aspects.（关系没有写）

Firstly, the author claims that genetically modified trees are so hard that they can adapt to any environment situation. However, the speaker refutes that. He says（注意用词）that those trees are more likely （最好用to)dying out as their genes are uniform. In another word, they cannot survival when faced with environmental challenge or pest-attacking.

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In terms whether the zebra mussel will exert negative influence on North American, the passage and lecture are contradictory to each other. The author believes that zebra mussel might do harm the local species as they arrived while the lecturer holds a different opinion.

First of all, the author makes a point that the history events suggest the zebra mussel's invasion is unstoppable. In the past, human transportation makes it possible for zebra mussel spread around the whole Europe and it is likely to happen again in North American. However, the lecturer demonstrates a different idea that a change made in the "ballast water" will prevent the invasion of zebra mussel from continuing. He says that if we refill the "ballast water" with ocean water, the mussel will no longer survive because the saline water might probably kill them all.

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In the reading, it mainly talks about that Rorbot E Peary has been to north pole because it has three striking evidneces. However, in the lecture, the professor thinks that the points provided in the reading are not convencing.

First of all, the reading points out that at the end of the investigation, the committee has concluded that Rorbot E Peary has been to the north pole. Nevertheless, the professor believes that the committee was not objective at all. Firstly, it was writed by his friends. What’s more, the investigation only msintained for two days and they can get precise conclusion in such a short time. So the committee is biased.

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TPO 33 Writing - Integrated Writing

Reading Part

Carved stone balls are a curious type of artifact found at a number of |locations in Scotland. They date from the late Neolithic period, around 4,000 years ago. They are round in shape; they were carved from several types of stone; most are about 70 mm in diameter; and many are ornamented to some degree. Archaeologists do not agree about their purpose and meaning, but there are several theories.

One theory is that the carved stone balls were weapons used in hunting or fighting. Some of the stone balls have been found with holes in them, and many have grooves on the surface. It is possible that a cord was strung through the holes or laid in the grooves around the ball. Holding the stone balls at the end of the cord would have allowed a person to swing it around or throw it.

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In the lecture, the professor casts doubt on the reading passage’s idea that it is unfortunate that people especially young people are reading far less literature novels, plays, and poems than they used to. The professor disagrees with the opinion of the reading material.

To begin with, according to the reading passage, while there has been a decline in book reading generally, the decline has been especially sharp for literature. So, by reading less literature, the reading public is missing out on important benefits. The professor argues that although the population of reading literature are lesser and lesser, people can gain a lot of benefits from other books. For example, science writing, history, political analysis and so forth are not literature perhaps, but they are often of high quality and these kinds of books can be just as creative and well-written as a novel or a play.

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TPO20综合写作题目解析

20xx年春节联欢晚会已经看完了，各种红包大家想必也抢到不少。年过完了，托福备考还是要接着进行。今天前程百利小编和大家一起继续备考托福。TPO的练习题目是每一位参加托福考试的学生必不可少的部分。

今天学习的是TPO20的托福综合写作题目。只有持续不断地练习，才能在最后的托福考试中脱颖而出，考出理想的成绩。

TPO 20综合写作阅读部分解析：

In the United States, it had been common practice since the late 1960s no to suppress natural forest fires. The “let it burn” policy assumed that forest fire would burn themselves out quickly, without causing much damage. However, in the summer of 1988, forest fires in Yellowstone, the most famous national park in the country, burned for more than two months and spread over a huge area, encompassing more than 800,000 acres. Because of the large scale of the damage, many people called for replacing the “let it burn” policy with a policy of extinguishing forest fires as soon as they appeared. Three kinds of damage caused by the “let it burn” policy were emphasized by critics of the policy.

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