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6.What is the matching of seniors with teens mainly based on?B.Their family conditions.A.Their life style.C.Their common interests.D.Their personal experiences.7.What can be inferred about Allen from the text?A.He always likes taking risks.B.He is creative in finding ways.C.He knows little about the seniorsD.He is particular about older participants.CHotter,drier cnditions ove the past four decades have been deereasing the rainforest birdsbody whie enthening their wing,study published in the jounal Sncedday.This maybe an adaptaionto hotter temperatures.Even in the midde of the primitivemaorainforest,we are seeing the global effects of climate change caused by people,said VitekJiree,lead author on the study.The scientists have studied measurements and weigh-ins of 77 different bird species in the Ama-on rainforest since the early 1980s.Nearly all of the bird species have gotten lighter as time goes on.On average,most species became about 2%lighter every decade."These birds don't vary that muchin size,"said co-author Philip Stouffer,a professor of conservation biology at Louisiana State Univer-sity."But when everyone in the population is a couple of grams smaller,it's significant."The researchers found that bird species living in higher parts of the forest-as opposed to closerto the forest floor-saw the most pronounced changes in terms of body composition.Those are thespecies most exposed to high temperatures.Longer wings and smaller bodies mean that birds have touse less energy to move around,helping them stay cool.Brian Weeks of the University of Michigan in 2019 researched the average sizes of 52 species ofmigratory birds in North America from 1978 to 2016.He also found all of them had smallerbodies and longer wings in 2016.This is another example of climate change-human actions globally-affecting a fundamental thing such as the size and shape of the birds.The same effect is likely tobe true of other species across the world living in extreme environments.8.What does the new study find about the birds in the Amazon rainforest?A.They are flying much higher.B.They have been physically longer.C.They are more flexible than adaptable.D.They have got smaller and longer-winged.9.How did researchers conduct their study?aombnol lai of Ho tas oinos clod a1A.By analyzing the collected data.5og9m知6 ol bnslni nodias s由nbtB.By referring to historical recordsC.By observing birds in the forests.3调oT国D.By cooperating with other research groups.o molalg lsuni lo toBs s