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8.What do we know about monarch butterflies?A.They fly to the US in autumn.B.They spend the winter in Mexico.C.They are the most beautiful butterfties.D.They were unknown to serentists.9.Why did scientists keep the monarehs'winter sanctunry a sccret?A.To keep the valleys from being destroyed.B.To do their research secretly.C.To stop farmers from cutting down trees.D.To protect the monarchs.10.What does the underlined word"revealed"in Parngraph 4 probably mean?A.Discovered.B.Seen.C.Forgotten.D.Kept.11.What is the purpose of the text?A.To tell about a great place to watch monarch butterflies.B.To provide information about monarch butterflies.C.To ask people to protect monarch butterflies.D.To call on people to help local farmers.D烟Historians and archaeologists have defined periods of human history for centuries by the氓technologies or materials that made the greatest impact on society.This includes the Stone Age,theBronze Age,and the Iron Age.But what age are we in now?That question can be answered with oneword for some researchers.Plastics.；A"Plastic has redefined our material culture and the artifacts we leave behind.It will be found instratified(分层的)layers in our trash deposits(沉积层，.”That's according to John Marston,anarchaeologist.Plastics are one of the most significant changes that humans have made to the Earth's makeup.Mostplastics don't easily degrade ()This only adds to the problem.Recycling ikn't an adequate solution.Not all types of plastic are easily fecyclable And there are only a few recycling plants that can process allvarieties of plastic.1:According to Debra Winter.writer for The Atlantic,this means that many of the materials throwninto recycling bins can cross the plane)several umes before they are processed.They are made into rugs,sweaters,or they are used to make other bottles.Millions of tonsof plastics re recycledevery year,butmillions more end up in landfills or the ocean.The problem has reached the point where it's possible thatin justfew decades there might be more plastic)in the world's oceans tha fishe高三英语试卷共8页第！页