英语阅读（十五）AWhen my first wartime Christmas came, I was in basic training in New Jersey and not sure if I would make it home for the holidays. Only on the afternoon of December 23 was the list of men who would have three-day passes posted. I was one of the lucky soldiers.It was Christmas Eve when I arrived home, and a little snow had fallen. Mother opened the front door. I could see beyond her, into the corner of the living room where the tree had always stood. There were lights, all colors, and ornaments shining against the green of a pine.“Where did it come from?” I asked.“I asked Gates boy to cut it, ”my mother said. “I wouldnt have had one just for myself, but when called-on, such a rush! He just brought it in this afternoon”.The pine reached to the proper height, almost to the ceiling, and the Tree Top Crystal Star was its place. A few green branches reached about a little awkwardly (难看) at the side, I thought, and there was a bit of bare trunk showing in the middle. But the tree filled the room with warm light and the whole house with the pleasant smell of Christmas.“Its not like the one you used to find,” my mother went on. “Yours were always in good shape. I suppose the Gates boy didnt know where to look. But I couldnt be fussy (挑剔).”“Dont worry,” I told her. “Its perfect.”It wasnt, of course, but at the moment I realized something for the first time: all Christmas trees are perfect.1From the passage we can infer that .Athe writer spent his first Christmas during the warBsoldiers did not all go home for Christmas during the warCall the soldiers had three-day passesDthe writer could not go home for Christmas2From the passage, we can conclude that .Athe writer used to cut very beautiful Christmas treesBhis mother didnt like Christmas treesChis mother didnt want to have a Christmas tree because it was wartimeDthe writer didnt like the tree cut by someone else3The best title for this passage would be .AHow to Choose a Christmas TreeBHow Soldiers Spent Their ChristmasCThe Perfect Christmas TreeDThe Christmas with an Ugly Christmas TreeBScientists found that our Earth is not cold, hard rock all the way through. Not at all. Only the crust, the outside of the earth is cold, solid rock.Below this cold solid crust of the Earth, there is hot rock that melts in places. Every now and then some of the hot, melted rock is pushed out.This hot, melted rock expands, and can push its way out through a weak spot in the Earths crust. When this happens, a volcano is made.The melted rock below the Earths crust can flow, like toothpaste (牙膏), if it is squeezed. If you squeeze a partly filled tube of toothpaste in one place, what happens?The toothpaste flows to another part of the tube. If you press down on one part of the tube with a finger, what happens? This tube rises in another place, as the toothpaste flows there, making a hill.Strangely enough, when a volcano forms, the Earth may be behaving like a tube of toothpaste. If the Earth is pressed down in one place, it may rise in another place. Hot, melted rock within the Earth may flow to another place as the Earth is pressed down. When this hot, melted rock breaks through the Earths crust, a volcano forms.A volcano is only one kind of mountain. Other kinds of mountains form when the Earths crust is raised. But each time the Earth is raised in one place, something is pressing against the Earth in another place.4Scientific findings have proved that .Athe earth is cold with hard rock being everywhereBthe earth is hotCthe earth is neither hot nor coldDthe outside of the earth is cold while there is hot rock below this cold hard rock5What is a volcano?AIt is a tube of toothpaste.BIt is a kind of mountain.CWhen the cold hard rock becomes hot and melts, it is a volcano.DW hen the cold hard rock becomes hard and melts, it is pushed out. Thus a volcano is formed.6Which of the following is true?AIf there is hot and melted rock, there will be a volcano.BA mountain is formed when the hot and melted rock pushes out.CA volcano is like a tube of toothpaste.DA mountain is formed when the melted rock below the Earths crust flows.CLast week, I bought an alarm system for about $ 450. It consisted of a control unit with three small units. I put the control unit in the sitting-room and fastened the other units by the front door, back door and living-room windows. The instructions told us to choose three numbers, so we chose 491, the last three numbers of our telephone number.Now I must explain how the alarm works:1.There is a power siren in the control unit. It makes a very loud noise.2.Each of the small units sends out beams or rays in different directions. If anything moves, it breaks a beam. This sends a signal to the control unit. The siren makes a noise which you can hear 50 meters away.3.When we go to bed, I press the three buttons numbered 4,