Unit 4 Space ExplorationUnit 4Section 请同学们认真完成 练案14 一、语言基础训练单句语法填空1There are still many problems _to be solved_(solve) before we are ready for a long stay on the moon.2He made a promise _to come_(come) here on time tomorrow.3Were to hold a meeting in half an hour.The decision _to be made_(make) at the meeting will influence the future of our company.4You dont have to run fast or for long _to see_(see) the benefit.5_To make_(make) it easier to get in touch with us，youd better keep this card at hand.6George returned after the war，only _to be told_(tell) that his wife had left him.7We were astonished _to see_(see) the building still in its original condition.8In college，there are so many good chances _to meet_(meet) your expectations.9He was the first traveler _to arrive_(arrive) in the island lying in the central of the Pacific Ocean.10We will be more than happy _to receive_(receive) materials，such as clothes，quilts and school supplies.完成句子1I hurried to Professor Wangs house _only to find he was out_.我匆忙赶到王教授的家，可是却发现他外出了。2During my last winter holiday, I went to the countryside with my father _to visit my grandparents_.去年寒假，我和父亲一起去了乡下看望我的祖父母。3California has lost half its big trees since the 1930s, according to a study _to be published_ Tuesday.根据本周二要公布的一项研究，自20世纪30年代以来，加利福尼亚已经失去了一半的大树。4With so many problems to solve, my brother was too worried _to eat anything_.有太多的问题去处理，我哥哥担忧得吃不下任何东西。5I stayed awake until half past eleven _so as to/in order to/to have a good look at the moon_ by myself.我熬夜到11点半，为的是独自好好看看月亮。6Andy and Ruby were the first _to reach the top of the mountain_，out of breath.Andy和Ruby首先到达了山顶，上气不接下气。二、培优提升训练阅读理解Edmund Halley was an English scientist who livedover 200 years ago.He studied the observations of cometswhich other scientists had made.The orbit of one particular comet was a very difficult mathematical (数学上的)problem.He could not figure it out.Neither could other scientists who dealt with such problems.However, Halley had a friend named Newton, who was a brilliant mathematician.Newton thought he had already worked out that problem, but he could not find the papers on which he had done it.He told Halley that the orbit of a comet had the shape of an ellipse (椭圆)Now Halley set to work.He figured out (解决；计算出) the orbits of some of the comets that had been observed by scientists.He made a surprising discovery.The comets that had appeared in the years 1531, 1607, and 1682 all had the same orbit.Yet their appearances had been 75 to 76 years apart.This seemed very strange to Halley.The different comets followed the same orbit.The more halley thought about it, the more he thought that there had not been three different comets, as people thought.He decided that they had simply seen the same comet three times.The comet had gone away and had come back again.It was an astonishing idea! Halley felt certain enough to make a prediction (预言) of what comet would happen in the future.He decided that this comet would appear in the year 1758.There were 53 years to go before Halleys prediction could be tested.In 1758 the comet appeared in the sky.Halley did not see it, for he has died some years before.Ever since then that comet has been called Halleys comet, in his honor.文章大意：本文主要介绍了200多年前英国科学家哈雷以及他的发现。1Halley made his discovery _C_.Aby doing experimentsBby means of his own careful observationCby using the work of other scientistsDby chance解析：细节理解题。由文中第三段中的“He figured out(解决；计算出) the orbits of some of the comets that had been observed by scientists.”可知应选C。 2Halley made a surprising, but correct prediction in the year _B_.A1704 B1705C1706 D1707解析：数字计算题。由最后一段中的“He decided that this comet would appear in the year 1758.There were 53 years to go before Halleys prediction could be tested.”可知，他预言彗星出现的时间是1758年，而这个预言还要经过53年才能验证，由此可以推断出哈雷做出这个预言的时间是1705年。3This passage in general is about _D_.AHalley and other scientistsBthe orbit of a cometCNewton and HalleyDHalley and his discovery解析：主旨大意题。本文主要介绍了哈雷以及他的发现。4Which of the following is TRUE？_C_AEdmund Halley was an American scientist.BHalley made his discovery by doing experiments.CNewton was a famous mathematician.DThe orbit of a comet had the shape of a circle.解析：细节理解题。从文章首句可以看出A项错误；从第三段的分析中可知B项也错误；由第二段可知，牛顿告诉哈雷彗星的轨道是椭圆形的，可排除D项。完形填空When I was about 18 months old, I was burned quite badly by hot water.This was a household accident, and now I can imagine how _1.D_ this must have been for my parents at the time.This took place in the 1970s, so the _2.C_ wasnt what it is today.I did get skin grafts(移植)，but it was still pretty bad.As I grew up, I _3.D_ my scars.They seemed so big and ugly.Kids would wonder what happened to me and stared at me directly.Unwilling to _4.C_ my scars, I always wore high-necked tops.I feared to wear a swims