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- 共用题干 The FamilyThe structure of a family takes different forms around the world and even in the sam...
- Mary is looking for the book she lost yesterday.
- 共用题干 The Northern LightsThe Sun is stormy and has its own kind of weather It is so hot and active t...
- 共用题干 第一篇Motoring Technology1.2 million road deaths worldwide occur each year,plus a further 50 mill...
- 共用题干 Ants Have Big Impact on Environment as“Ecosystem Engineers”Research by the University of Exete...
- 共用题干 Energy and Public LandsThe United States boasts substantial energy resources. Federal lands pr...
- He could not tolerate the extremes of heat in the desert.
- 共用题干 Sharks Perform a Service for Earths WatersIt is hard to get people to think of sharks as anyth...
- 共用题干 More Than 8 Hours Sleep Too Much of a Good Thing1 Although the dangers of too little sleep are...
- 共用题干 AnimalsSixth SenseA tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in Decemb...