单选题No one knows how man learned to make words. Perhaps he began by making sounds like those made by animals. Perhraps he grunted like a pig when he lifted something heavy. Perhaps he made sounds like those he heard all around him water splashing, bees humming, a stone falling to the ground. Somehow he learned to make words. As the centuries went by, he made more and more new words. This is what we mean by language. People living in different countries made different kinds of words. Today there are about fifteen hundred different languages in the world. Each contains many thousands of words. A very large English dictionary for example, contains four or five hundred thousand words. But we do not need all these. Before you leave school, you will learn only a few thousand of them.
单选题WhatdoweknowaboutSusan?[A]ShespeaksEnglishandChinese.[B]SheonlyspeaksChinese.[C]SheonlyspeaksEnglish.
单选题He knows ______ English now. A. a few B. a little C. quite a few
单选题I______play football than play basketball. [A] would rather [B] had better [C] prefer
单选题John failed his driving test and______made him unhappy. [A] which [B] this [C] they
单选题— ______ bag is this?— It's hers. [A] Who [B] When [C] Whose
单选题
单选题It's about 7 kilometres ______ from the bridge. [A] away [B] along [C] long
单选题据统计，近年来世界范围内每年都会发生20多起因为使用手机而引起的飞行事故，因此，世界上许多航空公司规定，飞机飞行时禁止使用移动电话。
为什么要在飞机上禁止使用移动电话呢?原来，飞机在高空中是沿着规定的航向飞行的，整个飞行过程都要受到地面航空管理人员的指挥。在高空中，飞行员一边驾驶飞机，一边用飞机上的通信导航设备与地面进行联络。飞机上的导航设备是利用无线电波来监测导航的，它接收到地面导航站不断发射出的电磁波后，就能测出飞机的准确位置。如果发现飞机偏离了航向，自动驾驶仪就会立即自动“纠正”错误，使飞机正常飞行。在能见度低的情况下，需要启用仪表着陆系统进行降落，也就是利用跑道上的盲降台向飞机发射电磁波信号，以确定跑道位置。所以手机发出的电磁波就会对飞机的导航系统造成干扰。当移动电话工作时，它会辐射出电磁波，干扰飞机上的导航设备和操纵系统，使飞机自动操纵设备接收到错误的信息，从而引发险情。
除移动电话外，使用寻呼机、笔记本电脑、游戏机时也会辐射电磁波，因此这些设备也不能在飞机上使用。在飞机上，使用中的这些电子装置会干扰飞机的通信、导航、操纵系统，会干扰飞机与地面的无线信号联系，尤其在飞机起飞和降落时干扰更大，即使只造成很小角度的航向偏离，也可能导致机毁人亡的后果。以移动电话为例，移动电话不仅在拨打或接听过程中会发射电磁波信号，在待机状态下也在不停地和地面基站联系，虽然每次发射信号的时间很短，但具有很强的连续性。
单选题
单选题This is a famous street in China. What is it? It's West Street. Why is it so famous? Now let me tell you something (41) it. West Street is in Yangshuo, Guangxi. It's over 1,400 years (42) .It's about 1,000 meters (43) . But it's very clean and beautiful. In the street, there are (44) shops. The things in the shops are nice and cheap. Every day, lots of visitors come here. Many of (45) are foreigners. It's a good place to practice speaking English. So West Street is called the biggest English corner. Some people (46) call it the earth village. Almost everyone in the street (47) English. But you mustn't ride your bike or drive your car in the West Street. You can only (48) here. Why? Because it's a walking street. In the street, you needn't worry that you'll be hit by cars. (49) happy! West Street is a wonderful place to visit. (50) West Street.
单选题It was sunny. A small boy and his father (41) a walk in the country. It suddenly began to rain hard. They didn' t have their umbrellas (42) them and there was nowhere to hide from (43) rain, (44) they were soon (45) . As they walking (46) through the rain, the boy (47) his father and asked him, "Why does it rain, Father? It isn' t very nice, isn' t it?" " (48) very nice, but it' s useful, Tom," (49) his father. "It rains to make the fruit and the vegetable grow for us," Tom thought about this for a moment, and then he said, "Then, why does it rain on the road (50) , Father?/
单选题无论在什么地方，想成为英语教师的人都有一个共同点：希望他们的专业地位和技能得到某种肯定，并能得到工作。前一个要求对个人来说显然是重要的，但是如果你要想找到工作的话，那这就更加不可缺少了。
十年前的情况却并不是这样。实际上在每一个发展中国家里，在许多发达国家里也同样，只要你的母语是英语，这就足以使你有资格被聘为英语教师。而现在，招聘者只看教师是否具有能教好英语的知识和技能，还有工作态度。这样做的结果就是把母语为非英语的英语教师提升到了和母语为英语的教师同等的地位，这是他们早该享受却很少享受到的待遇。母语为非英语的英语教师现在很高兴，因为语言上的歧视已经成为过去。
一项正在进行的由剑桥大学资助的研究项目，抽样调查了40多个国家的教师、教育工作者及聘用教学者，向他们询问母语为英语的教师和母语为非英语的教师的差别是否重要，回答是否定的。应聘者只要能教，并具备所要求的英语水平，他们是什么人、来自什么国家和地区并不重要。这样，一种新的歧视(这种歧视是合理的，因为它将不合格的人区别出来了)解放了语言上受歧视的人。然而，剑桥大学研究院的成果还不限于此：它确认了对英语为母语的教师和英语为非母语的教师的要求是极为相似的。
单选题HowcanwegettoNewYork?A.Byplane.B.Bybike.C.Bymotorbike.
单选题
单选题向日葵原产北美洲，万历年间由传教士传入中国。历代学者在记载向日葵时，都特别提及其向日性。如梅尧臣《葵花》诗：“此心生不背朝阳，肯信众草能翳之。”刘克庄诗《葵》：“生长古墙阴，园荒草木深。可曾沾雨露，不改向阳心。”可见自古以来“葵”就与“向阳”紧密联系在一起。
那么，向日葵究竟向不向日?
答案是：要看处于什么生长阶段。向日葵从发芽到花盘盛开之前这一段时间，的确是向日的，其叶子和花盘在白天追随太阳从东转向西，不过并非即时的跟随，植物学家测量过，其花盘的指向落后太阳大约12°，即48分钟。太阳下山后，向日葵的花盘又慢慢往回摆，在大约凌晨三点时，又朝向东方等待太阳升起。但花盘一旦盛开，就不再向日转动，而是固定朝向东方了。
简单地说，是这样的：光照射到芽的尖端，被光受体吸收，激发生长素的合成。光同时刺激向光面和背光面的生长素的合成，但是背光面的生长素合成量要高3倍。在芽尖合成的生长素经由维管组织向下传输，与细胞膜上的蛋白质受体结合，刺激细胞壁拉长。由于背光面的生长素浓度较高，导致背光面的细胞被拉得较长，从而朝着向光面弯曲。
显然，向日葵的叶子和花盘之所以能朝着太阳转动，是因为在阳光的照射下，生长素在向日葵背光一面含量升高，刺激背光面细胞拉长，从而慢慢地向太阳转动，在太阳落山后，生长素重新分布，又使向日葵慢慢地转回起始位置，也就是东方。
在花盘盛开后，向日葵也停止了生长，而把花盘固定朝向东方。这可能是自然选择的结果，对向日葵的繁衍有益处。向日葵的花粉怕高温，如果温度高于30℃，就会被灼伤，因此固定朝向东方，可以避免正午阳光的直射，减少辐射量。但是，花盘一大早就受阳光照射，却有助于烘干在夜晚时凝聚的露水，减少受真菌侵袭的可能性；而且在气温较低的早晨，阳光的照射使向日葵的花盘成了温暖的小窝，能吸引昆虫在那里停留，帮助传粉。
通过以上的介绍，我想已足以消除某些观察过向日葵的大人、小孩儿的困惑了。他们不轻信常识，能够自己观察验证，敢于挑战权威，这是难能可贵的。
单选题I ______ go there this morning, so I stayed home. [A] didn' t need to [B] didn' t need [C] needn' t to
单选题Why are you so angry ______ each other? A. at B. with C. to
单选题______ in the same class. A. I and Lucy is B. Lucy and I are C. Lucy and I am
单选题Indians always shake (摇) their heads when they talk to others. (41) does not have the same meaning (42) "no". If someone wants to visit India, (43) should know this, (44) it will give him some trouble. One day, a foreign officer went to India on business. He hired (雇佣) a car and an Indian to drive it. When he (45) the driver to send him to his office, the driver shook his (46) at once. The officer repeated his order, and the driver (47) so again. At last, the officer, of course, got (48) . " (49) dare you refuse (拒绝) my order?" he shouted. "Drive me to office immediately!" The driver answered (50) quite a loud voice, too. "Yes, sir !" But he still shook his head at the same time. Suddenly the officer realized that, "No means Yes here!/