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 Theme:
The bad trends will result in the continuing decline of birds in the United States.
Sub point 1: As human populations and settlements continue to expand, birds' natural habitats will continue to disappear.
Sub point 2: The growth of agriculture will result in the further destruction of bird habitats as more and more wilderness areas are converted to agricultural use.
Sub point 3: Pesticides have significantly contributed to declines in bird population.
2. 听力要点概括：
Main point: There will be fewer and fewer birds, but the arguments used to support this claim are unconvincing.
Sub point 1: Urban development actually provides better and larger habitats for other types.
Sub point 2:New crops produce more food per unit of land, and as a result, there's no need to destroy wilderness areas.
Sub point 3: People are aware of the possible consequences of traditional pesticides, two good changes have occurred.
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