陕西省西安交大阳光中学高中英语 Unit 3 Under the Sea Revision 导学案（学生版）新人教版选修 7第 课时课题名称时间第 周 星期课型Revision主备课人目标Go over useful words , expressions and grammar of this unit by summing up.重点Finish a cloze text and improve yourself by practice.我的问题难点cloze自主学习1. Write down what you have learned about “ Under the Sea”. 2.From this unit you have also learned : Useful verbs : Useful nouns: Useful adjectives/adverbs: Useful expressions: A new grammar item: 精讲互动18 oysters（牡蛎，蚝） will make pearls; not all oysters produce them. Oysters produce pearls only when they are 19 by sand. If a 20 of sand enters the oyster's 21 , the oyster becomes hurt because the 22 grain of sand irritates(使…… 不适，刺激) the smooth, soft skin of the oyster. The oyster tries to 23 itself by producing a white 24 that looks like milk. The oyster covers the 25 with a milky fluid. The fluid protects the oyster. Later the white liquid become 26 . This hardened liquid forms a shell, or bead, around the sand. At this time a pearl is beginning to 27 .The white pearl grows 28 inside the oyster's shell. 29 , it takes about six or seven years for the oyster to produce a pearl. Not 1all oysters produce pearls 30 most oysters sometimes take sand into their 31 . Only sand which the oyster cannot get rid of will 32 it. In other words, if an oyster "swallows" some sand, it will manage to "spit it out". If the oyster cannot get rid of the 33 , then it will produce the white fluid to 34 itself. Actually, only about one in a thousand oysters will produce a pearl; that is, 35 than one percent.16. A. inventedB. broughtC. producedD. caused17. A. bottomB. baseC. floorD. ground18. A. Only someB. Only fewC. All ofD. A lot of19. A. harmedB. coveredC. destroyedD. injured20. A. pieceB. grainC. littleD. bit21. A. shellB. bodyC. eyesD. back22. A. hardB. vividC. sharpD. rough23. A. preventB. defendC. protectD. guard24. A. waterB. matterC. liquidD. object25. A. injuryB. shellC. sandD. pearl26. A. bright B. hard C. strong D. pure27. A. make B. produce C. do D. form28. A. slowly B. fast C. safely D. quickly29. A. Often B. Actually C. Usually D.Sometimes30. A. even though B. in case C. so long as D. only if31. A. bodies B. shells C. bottoms D. caves32. A. destroy B. irritate C. soft D. open33. A. sand B. shell C. milk D. liquid34. A. cover B. destroy C. produce D. protect35. A. fewer B. more C. less D. smaller作业2小结1. 总结文 章所涉及的语言点及典型句型。重点单词： 重点短语： 典型句型： 2. 找出文章中的过渡词或句子。 3
