在否定结构中： don't have to表示“不必”;  mustn't 表示“禁止”。 You don't have to tell him about it.  你不必把此事告诉他。 Smoking mustn’t be allowed in the office.  严禁在办公室吸烟。 背单词的好方法 随时随地背单词 不知不觉背单词 In this paragraph there are many nouns, such as boy, girl, and book. 这一段里面有很多名词，例如男孩、女孩和书本。 In general, though, studying international customs can certainly help avoid difficulties in today’s world of cultural crossroads! 但总的说来，在当今文化交融的世界，学习不同国家的习俗肯定能帮助我们避免交往中的困难。 In general, Americans learn to view the world from their own point of view, that of the individual self. 通常美国人学会以自己的观点看世界，也就是以个人的角度看世界。 I crossed the street to avoid meeting him, but he saw me and came running towards me. 我横穿马路以便避开他,但他看到了我并朝我跑过来。 14. When in Rome, do as the Romans do. 入乡随俗。 Do as I say, not as I do.按我说的做，但不要跟我做的学 看以下例子并判断其中的含义： a)Treat other people as you hope you hope they will treat you. b)The disabled should be treated with respect/kindness/consideration.  c)My dad wanted to treat me to a vacation like never before. d)Beijing is able to treat 90% of waste water. e)Some doctors are treating her for her illness. come up close to you 走近你 come up 走上前来；发生，出现Something urgent have come up. 发生了紧急的事情。 come up to达到（高度、程度）；符合 If you would give me another chance, I believe I can come up to your expectation.如果你再给我一个机会，我相信我能达到你的期望。 close to 接近于,在...的近旁 We live close to the water as humans live close to the air. 我们的生活与水最接近，就如人类的生活与气最接近。 Why was Garza's move a success? A. It strengthened her family ties.  B. It improved her living conditions.  C. It enabled her to make more friends. D. It helped her know more new places. What was the reaction of the public to Mrs. Robinson's decision? A. 17% expressed their support for it. B. Few people responded sympathetically. C. 83% believed it had a bad influence. D. The majority thought it was a trend.