1、周末训练（5）2017.4.14一、阅读理解 We are used to the idea of aging in ourselves. We are so used to this that it comes as a surprise to find that there may be some animals that do not age. Sea anemones(海葵) are an example. Some have been kept for nearly a century without showing any signs of lifelessness. Some k
2、inds of sea worms can even “grow backwards.” If kept in the dark and given nothing to eat, they get steadily smaller, They finally end as a ball of cells(细胞) looking rather like the egg from which they came. Under good conditions the ball will turn back to a worm and start growing again. One could p
3、robably keep them growing and un-growing again and again.1. Some sea worms grow smaller when they _. A. lose weight B. live in the darkness C. are under good conditions D. dont eat and are kept in the dark线索句:2. According to the passage, some sea animals _. A. will die when they become a ball of cel
4、ls B. do not grow old C. will die without food D. will stop growing any time they want线索句:3. According to the passage, which of the following statements in NOT true? A. We can keep certain kind of sea worm growing and ungrowing again and again. B. Human beings will grow old and die. C. An anemone is
5、 a king of sea worm that can grow backwards. D. Some anemones will live nearly a hundred years.线索句:4. The underlined word aging in the first sentence means _. A. growing old B. the age of a person C.getting younger D. un growing线索句:5. This passage is mainly about _. A. sea animals B. cells C. aging
6、D. anemones线索句:二：生词：are used to+n be used to do ing used to do age(v) surprise nearly century without signs lifelessness worms backwards dark steadily finally end rather Under good conditions turn back to: grow again probably gain lose weight statements certain Human beings 三：翻译：周末训练（6） 2017.4.21一、阅
7、读理解 Can trees talk? Yes, but not in words. Scientists have reason to believe that trees do communicate (交际) with each other. Not long ago, researchers learned some surprising things. First a willow tree attacked in the woods by caterpillars (毛虫) changed the chemistry of its leaves and made them tast
8、e so terrible that they got tired of the leaves and stopped eating them. Then even more astonishing, the tree sent out a special smell-a signal (信号) causing its neighbors to change the chemistry of their own leaves and make them less tasty. Communication, of course, doesnt need to be in words. We ca
9、n talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar (花蜜) for honey. So why shouldnt trees hav
10、e ways of sending message?1. It can be concluded from the passage that caterpillars do not feed on leaves that _. A. are lying on the ground B. have an unpleasant taste C. bees dont like D. have an unfamiliar shape线索句:2. The willow tree described in the passage protected itself by _. A. growing more
11、 branches B. communicating with birds and bees C. changing its leaf chemistry D. shaking caterpillars off线索句:3. According to the passage, the willow tree was able to communicate with other trees by _. A. waving its branches B. giving off a special smell C. dropping its leaves D. changing the colour
12、of its trunk线索句:4. According to this passage, bees communicate by _. A. making special movement B. touching one another C. smelling one another D. making unusual sound5. The author believes that the incident described in the passage _. A. cannot be taken seriously B. should no longer be permitted C.
13、 must be checked more thoroughly D. seems completely reasonable线索句:二：生词：Scientists reason believe researchers surprising willow attack woods change chemistry leaves taste terrible got tired of stopp even astonishing sent out special smell signal cause neighbor whole pattern honey. conclude feed on u
14、nfamiliar shape protect branch trunk三：翻译： 周末训练（7）4.28一、阅读理解 Today Ill be talking about the invention of the camera and photography. The camera is often thought to be a modern invention, but as early as 1727, a German physicist discovered that light darkens silver salt. Used as a camera, a big box wa
15、s set up, and a small hole was cut in one side to let the light in; he made temporary pictures on the salt. Silver salt is still the base of the photographic film today. Then a French scientist made the first permanent (永久的) picture by using a special piece of metal which was covered with silver sal
16、t. A photograph he made in 1826 still exists. The painter De Gear improved the process (制作法) by covering the metal also with placing the common salt which we can eat. This was in 1839, the official date of beginning of photographs. But the problem was the printing of the photographs. And it wasnt un
17、til other scientists developed the kind of photographic paper we now use that good prints were possible and photography became truly modern. In the 1870s, Matthew Bradey was able to take his famous pictures in American Civil War. In the 20s of this century, Georges Mann of the United States simplifi
18、ed film developing (冲洗), and Dr Edward Lane invented the socalled Instant Camera which uses selfdeveloping film. If we say photography came into existence in 1839, it follows that it took more than 100 years for the camera to reach its present condition of technical refinement(密度).1. What discovery
19、was the basis of photography? A. Light darkens silver salt. B. Light darkens natural salt. C. Light darkens silver. D. Light darkens self-developing film线索句:2. How was the first permanent picture made?A. By making use of special paper. B. By adding common salt to silver salt.C. By giving a slight co
20、lour to the silver salt. D. By using a special piece of metal.线索句:3. What does the speaker regard as the official date of beginning of photography? A. 1727 B. 1826 C. 1839 D. 1870线索句:4. According to the speaker why is Matthew Bradey remembered today? A. He was a soldier. B. He took war photographs.
21、C. He painted portraits. D. He designed a portable camera.线索句:5. What did Doctor Edward Lane invent? A. A cheap process of developing film at home. B. A new kind of film. C. An automatic printer. D. An instant camera that develops its own film.线索句:二：生词：invention camera photography modern physicist discover light darken silver salt set up hole temporary base scientist special metal sent out special cover exists improve common official simplified existence reach basis permanent regard as branch t三：翻译：