TPO (TOEFL Practice Online) 是美国教育考试服务中心(Educational Testing Service，简称ETS)专为参加
1. 阅读要点概括：
Main point: Planting genetically modified trees on a large scale promises to bring a number of benefits.
Sub point 1: Genetically modified trees are designed to be hardier than nature trees.
Sub point 2: Genetically modified trees promise to bring a number of economic benefits to those who grow them.
Sub point 3: The use of genetically modified trees can prevent overexploitation of wild trees.
2. 听力要点概括：
Main point: There are some serious problems and causes associated with the using of genetic modified trees.
Sub point 1: Genetically modified trees may be resistant to one particular condition, but it doesn’t necessarily ensure their survival.
Sub point 2: There are hidden causes associated with the growing genetically modified trees.
Sub point 3: Genetically modified trees might actually cause even more damage to the local wild trees.
TPO逐题精讲”能有效帮助您查漏补缺，完美备考。
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