【正文】 heavy backpack forces the muscles and spine to balance the unequal weight. This may increase the possible back problems later in life.More than 50 percent of young people suffer back pain by their teenage years. Research shows that this could be mainly caused （場）improper use of backpacks.Here39。 and even hurt the spinal column（脊柱）This can cause muscle strain, headaches, back, neck and arm pain.t know exactly how to choose, load, lift and wear themthese allimportant accessories（配件）can be a pain in the back. Not to mention the neck, head and shoulders.根據(jù)文章大意本文主要介紹提供一些問題和答案來說明人體是一臺能提出許多有趣問題的機器。s a mon thing, but researchers don39。可知選項A不符合文章內(nèi)容，故排除A；As for the actual function of blushing, researchers are still trying to find that one ，研究人員仍在努力找出其中之一。就會在胃里產(chǎn)生聲音。（2）細(xì)節(jié)理解題。 Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise。Some Useful DiscoveriesD.Researchers don39。s how it makes a difference to your digestive tract.（3）Which of the following statements is TRUE? A.And that39。re hearing when your stomach makes noise.B.D.B.t have a good explanation for it. They do, however, know this happens only with humans and chimpanzees（黑猩猩）. A bigger question puzzling scientists is why we yawn at all. It used to be thought that yawning showed that oxygen to the brain was not enough, but that39。re embarrassed, your brain releases a shot of adrenaline（腎上腺素）, which makes your heart race and blood vessels bee larger in size. All this happens to increase blood flow and oxygen delivery throughout the body in a fightorflight reaction（對抗反應(yīng)）. There are a lot of tiny blood vessels in your face, which turn noticeably redder from this sudden rush of blood. As for the actual function of blushing, researchers are still trying to find that one out.m embarrassed?re hungry. Think of your digestive tract（消化道）as a really long tube lined with smooth muscle tissue. These muscles move food, fluids and gas through your digestive tract. ___________. It can make you feel embarrassed（尷尬的）but is nothing to worry about.t exactly sure what causes the brain freeze when we eat ice cream or other super cold foods too quickly, though some believe it39。 Why do I get a headache when I eat ice cream too quickly? The human body is a machine that can raise lots of interesting questions. Why, for example, are yawns （呵欠） contagious （傳染的）? What39。細(xì)節(jié)理解題要可以直接從文中尋找答案；句義猜測題，需要根據(jù)單詞所在的語境，進(jìn)行合理想象，確定句子的意思；標(biāo)題判斷題需要在充分理解文章的基礎(chǔ)上，總結(jié)中心思想，凝練句式，最終確定答案。 第三段最后and over again until she finally reached her goal of going around the whole track without falling once，又一次，直到她最終達(dá)到了自己的目標(biāo)，在整個賽道上不摔倒一次，故答案是C。 （4）細(xì)節(jié)排序題。 （3）細(xì)節(jié)理解題。根據(jù)At first, I thought Lucy was able to ride her bike along the track, but she quickly found that her bike was too low to the ground and kept getting stuck on top of the bump. 可知，起初， 我以為露西可以沿著賽道騎車， 但她很快發(fā)現(xiàn)她的自行車離地太低，一直卡在隆起的路面上。她不斷地振作起來，再試一次。露西騎自行車確實有很多困難。D.B.Playing in the Park Is FunB.a﹣b﹣c﹣d.Being cheered on by everyone.B.Lucy would get hurt and cry all the way home.B.To find her speed was too slow.C選項意為肯尼亞的每個家庭都有電，與原文不符，故選C。根據(jù)Some of the students spend over an hour running home. They do chores at home and hopefully manage to find some time to study before it gets dark. 根據(jù)Form 1， Form 2， Form 3 and Form 4. They are the equivalent（對等） to our 9th， 10th， 11th and 12th grades. 第一組、第二組、第三組和第四組，他們分別對應(yīng)112年級，故選C。The Form I class had the most students.C.t like studying in the school.C.The teachers asked the students to take notes.（3）Why do some students run home from school？ A.The students did not pay the schools.B.Grade 10.s country？ A. textbooks. I taught math, English and physics at Chamasiri Secondary School while I was a teacher in Kenya. This school had four classrooms ﹣one for each grade, Form 1, Form 2, Form 3 and Form 4. They are the equivalent（對等） to our 9th, 10th, 11th and 12th grades. Teachers traveled from classroom to classroom instead of the students going from room to room. The Form I class had 60 students, Form 2 had 45, Form 3 had 30, and Form 4 about 12 students. The class sizes became smaller as the grades continued on. Why did this happn? Many families were very poor and could not afford the school fees（學(xué)費）. Most countryside schools in Kenya did not have a lot of money. As a result, there were very few textbooks for the students to use. I had seven math texts for my Form 2 class and 14 for the Form I class. Anything the students needed to know was put up on the blackboard and the students copied it down into their notebooks. The notebooks became the students39。 Kenyan students study ten different subject areas. Some of the students spend over an hour running home. They do chores at home and hopefully manage to find some time to study before it gets dark. Most families do not have electricity and may not even have candies for their children to study by.m sure it will have a good future.（1）Which grade does Form 3 refer to（指的是） in the writer39。B.Grade 11. textbooks？ A.The students preferred to use their notebook.D.They don39。In Kenya, a school year has three terms.B. （1）細(xì)節(jié)理解題。 （3）細(xì)節(jié)理解題。 題目問以下哪一個選項是不對的，根據(jù)Most families do not have electricity and may not even have candies for their children to study ，大多家庭沒有電，甚至沒有蠟燭供孩子們學(xué)習(xí)用。2．閱讀理解 t want to leave and everyone was cheering her on.TO play other kids.To discover a track for fun.C.To ride her bike along the track.（2）What does the underlined sentence probably mean in Paragraph 2？ A.Lucy would have trouble riding the bike and give up soon.（3）What did Lucy take the bike into the main park for ? A.Reaching her goal of riding the bike at once.（4）Which one is the right order of the even