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The second period for Language points for ReadingStep1.RevisionCheck the homework.Step2.Key points1.that is to say /that is 也就是说，即常用来进一步解释前面说过的事情。
这是个固定短语，在句中作插入语，前面都可有逗号，后面可接句子或短语。
eg. My boss has asked me to attend a lecture about the use of the Internet three days from now, that is to say, on Friday.John is a Londoner, that is to say, he lives in London.2.value n.价值，重要性，益处eg. People seldom realize the value of health till they have lost it.What is the value of the book?This is the value of regular exercise.value v.重视，尊重，估计eg. I’ve always valued your friendship/your advice.The Ss have always valued their teachers.The machine is valued at 1,000 yuan.3.form v.形成，构成，养成，想出，成立eg. Five colleges formed the university.Water forms almost three quarters of the human body.Clouds are forming on the top of the hill.form a /the habit form in line in the form ofform n.形状，外形，形式eg. She has a tall graceful form.These are two different forms of the same thing.4.in need of 需要中的，需要。
