全国各地接二连三地发生了多起特大安全事故，造成严重的人员伤亡，特别是北京密云、吉林商厦等特大安全事故，引起了党中央和国务院的高度关注Unit 5Canada“The True North”Section Grammar同位语从句.单句语法填空1He got the news from Mary that the meeting had been called off.2I have no idea why Tom got so much money overnight.3My best friend asked me the question whether that novel was worth reading.4I have no idea where the journalist could have got his information from.5A warm thought suddenly came to me that I might use the pocket money to buy some flowers for my mothers birthday.6The fact that our city can become better in every field is clear.7Do you still remember your promise that you will buy me a bike on my birthday?8The professor showed evidence that his paper was based on original research.9The manager didnt answer the question who would take his place.10The fact has worried many scientists that the earth is becoming warmer and warmer these years.阅读理解It might be easy to imagine that the more crowded a bird flock (群) becomes, the slower the birds fly. But it has been proven that the bigger a bird flock becomes, the faster the birds will fly. The discovery was made by scientists from Swedens Lund University. They took a look at the flying speed of birds in an effort to find what influenced how fast they would fly.Most of the findings didnt surprise the researchers. A birds weight and its wing shape, wind speed and direction, and the purpose of the flight all indeed influenced its flying speed. But the scientists found that the size of the flock had a strong effect on the flying speed, which had not been expected. The scientist Anders Hedenstrm expressed surprise at the discovery as it has usually been ignored in studies on birds.Anders Hedenstrm and his partner Susanne Akesson collected their data on Swedens land Island. There they studied birds physical characteristics (特征), counted flock populations, and recorded their speeds during flying. To know the birds speed while flying, they used a tool that can also gauge important characteristics of wind, including speed and direction. They were able to measure the speed of different kinds of large flocks. The researchers results showed that bigger flocks fly faster no matter what kind of bird species they belong to. Why thats the case is the next question they hope to answer.The researchers also said that large flocks are made up of largersized birds, which move at faster speeds than smaller birds. In a large flock, it is easier to take advantage of the turbulence (湍流) that occurs behind other birds, especially when flying in formation (队形), like geese and other birds do. Using the turbulence makes it easier to maintain higher speed.【文章大意】原本人们认为鸟群的数目越大，就会飞的越慢，而最新的研究却得出了完全相反的结果。这是为什么呢？1What does Paragraph 1 mainly tell us?AThe bigger the bird flock is, the faster the birds fly.BThe bigger the bird flock is, the slower the birds fly.CWhat affects birds flying speed didnt interest people.DThere was no further progress in studying birds flying speed.解析：A段落大意题。根据第一段的内容可知，最新的研究表明：并非鸟群的数目越大，飞行速度越慢，而是恰好相反。2What does the underlined word “gauge” in Paragraph 3 probably mean?AMeasure. BAffect.CChange. DControl.解析：A词义猜测题。根据划线词后面的They were able to measure the speed of different kinds of large flocks.可知，gauge意为“测量”。3What can be learned from the last paragraph?ABirds are naturalborn flyers.BBigger birds fly slower than smaller ones.CTurbulence helps birds maintain higher speed.DThe goose is the slowest flying bird in the world.解析：C推理判断题。根据最后一段的内容可知，鸟类可以利用大气湍流维持飞行速度。.完形填空It was raining outside and I was preparing my breakfast at home. _1_， a bottle of orange juice slid (滑) from my hand and fell to the floor. Glass and juice _2_ everywhere. I looked at the _3_. Then my eyes were filled with tears. They came from a(n) _4_ acceptance that “Today is just not my day”It was a bad day for me _5_ things had to be done. I drove into town. In the few minutes it took to the bank, I made a _6_. Though I had a bad day, I would be _7_ not to pass it to anyone else. I would be happy and _8_.Standing in line, I was silently talking to myself. For the _9_ time that day my eyes were filled with tears as I _10_ how disconnected (隔离的) I felt from others. Then a _11_ drew my attention. “Young lady，” she was saying.I _12_ and saw the bank teller, an old lady with a gentle smile. Her eyes showed _13_ as she softly said, “I dont _14_ what is happening inside of you, but please believe me when I tell you that everything will be okay.”And then she did something quite _15_. My hands were resting on the counter and she placed her hands _16_ on top of mine. The _17_ was quick but electric. And in that moment my world changed.In the moment of her touch my selfdoubt _18_. I found understanding and acceptance. I knew that _19_ was being passed through the heart of this old lady directly into my heart. Then