1、陜西省西安交大陽(yáng)光中學(xué)高中英語(yǔ) Unit 3 Under the Sea Revision導(dǎo)學(xué)案（學(xué)生版）新人教版選修7第 課時(shí)課題名稱時(shí)間第 周 星期課型Revision主備課人目標(biāo)Go over useful words , expressions and grammar of this unit by summing up.重點(diǎn)Finish a cloze text and improve yourself by practice.我的問(wèn)題難點(diǎn)cloze自主學(xué)習(xí)1. Write down what you have learned about “ Under the Sea”. 2.Fr

2、om this unit you have also learned : Useful verbs : Useful nouns: Useful adjectives/adverbs: Useful expressions: A new grammar item: 精講互動(dòng)18 oysters（牡蠣，蠔） 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 oysters 21 , the

3、oyster becomes hurt because the 22 grain of sand irritates(使 不適，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 har

4、dened 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 oysters shell. 29 , it takes about six or seven years for the oyster to produce a pearl. Not all oysters produce pearls 30 most oysters sometimes take sand into their 31

5、 . 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;

6、 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

7、. 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. destro