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I first met Sister Esther 10 years ago when I was her student at Edgewood College in Madison,Wisconsin.Kristil was 3 at the time,and I sometimes took her to class.Sister Esther wasunderstanding and would bring coloring books to occupy Kristil.Even after I graduated,we still kept in touch.I had grown to love her like family.I rushed to the front of my building."What are you doing out in this weather?"I asked as wehugged."Well,I tried to call you last week but couldn't get through.Then I called your company andthey said you weren't working there anymore,so I thought I would come by,"Sister Esther said.“I have gifts for you and Kristil.”She handed me a card."This is for you,"she said as she kissed me on the cheek.I walkedher to her car and waved as she pulled away.When I opened her card,I turned in shock.Hundred-dollar bills fell onto the table.Tears ofgratitude puddled in my eyes as I counted.Sister Esther had given me $1,000.14 years passed,but I've never forgotten what Sister Esther did for us.24.Why did the author say the world was closing in on her?A.Because she couldn't find any well-paid job.B.Because she lost her job and could hardly make ends meet.C.Because she had no access to a wealthy gated community.D.Because she couldn't content herself with nice things.25.How did the author probably feel after dropping her daughter for a birthday party?A.Depressed.B.Hopeful.C.Awkward.D.Confident.26.Which of the following can describe Sister Esther Heffernan?A.Serious.B.Determined.C.Courageous.D.Thoughtful.27.What does the text want to convey?A.Love me,love my dog.B.The flames rise high when everybody adds fuel to it.C.A friend in need is a friend indeed.D.Roses are given,and the fragrance remains in hand.CScientists have known for many years that houseplants benefit people's well-being.Nowresearchers have found a way to make plants even better for human health.Using a method calledgenetic modification(GM),they raised plants that reduce indoor air pollution.GM means changinga plant or an animal by altering its DNA,including adding DNA from another species.Indoor air pollution is produced by cleaning products,cooking,and dust,among other things,and it can be bad for people's health.In 1989,research done by NASA found that houseplantscould clean the air in a home.Later studies,however,showed that plants actually made too smalla difference to help much.Since then,scientists have been experimenting with the DNA of certainpotted plants to try to create one that will reduce more air pollution.In 2018,scientists from the University of Washington decided to adapt a houseplant calledpothos,or devil's ivy,which is popular and easy to care for.The team inserted new DNA based ona chemical found in a rabbit's liver.In the animal,the chemical breaks down harmful substances.The team found that the new DNA made the plant better at absorbing pollution.Lately,a company called Neoplants added more DNA,from two types of bacteria.As thedevil's ivy grew,the team studied it carefully.Tests suggested that it was up to 30 times better atsucking pollution than the non-GM plants that NASA tested back in 1989.The company is also英语试题第4页（共8页）
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