17. 购物： What can I do for you?您要买点什么？ Can I help you?　您要买点什么？ What’s the price of …?…的价钱是多少？ How much is…? …多少钱？ It’s well worth the money. 很合算。 Have you got anything a little cheaper? 有没有比这便宜点的？ How much does it come to? 总共多少钱？ How much is it altogether? 总共多少钱？ Try it for size. 试试大小。 Will you show me…? 请拿给我看…？ Have you got any…? 你们有…吗？ It’s a bit too large (small, plain. gaudy etc.) for me. 这对于我来说太大(太小，太素，太花哨等)了。 That’s fine. I’ll take it. 那好，我买了。 That’s too expensive, I’m afraid. 恐怕那太贵了。 What colour do you want? 你要什么颜色？ What size do you want? 你要什么尺寸的？ Do you have any other kind? 你们有别的种类吗？ I’d like…我要… I want…我要…

16. 打电话： This is…(speaking). 我是…(一般不说I am…) It is …here. 我是… May I speak to …, please? 请找…接电话好吗？ Can I speak to …, please? 请找…接电话好吗？ Could I speak to …, please? 请找…接电话好吗？ I’d like to speak to…, please. 请找…接电话好吗？ Who’s that (speaking / calling)? 你是谁？(不说Who are you?) Is that …(speaking)? 你是…吗？ Is …there? …在吗？ Is…in? …在吗？ Hold on, please. 请稍等。 Hold the line, please.请稍等。 Can I take a message? 你可以留个口信吗？(对方要找的人不在时) Can you give/ leave a message? 你可以留个口信吗？(对方要找的人不在时) Can/Could I ask who is calling? 请问您是哪位？ May I have your telephone number? 您的电话号码是多少？

4.感谢和应答 表示感谢 通常回答 Thank you very much. Not at all. Thanks a lot. That's OK. Many thanks. That's all right. Thanks for helping me. You're welcome. 5.祝愿、祝贺和应答 ⑴A:Good luck! Best wishes to you. Have a nice/good time/journey. Congratulations! B:Thank you. ⑵A:Happy New Year! Merry Christmas! B:The same to you. ⑶A:Happy birthday to you. B:Thank you. 6.道歉和应答 A:I'm sorry.I'm sorry to trouble you. B:It doesn't matter. It's not important. That's nothing. 7.遗憾和同情 What a pity!I'm sorry to hear that. 8.邀请和应答 A:Would you like to … ? B:Yes, I'd love to. 9.提供帮助和应答 A:Can I help you?=What can I do for you?Here, take this/my bike. Let me do it for you.B:Thanks for your help. Yes, please. No, thanks. That's very kind of you. 10.请求允许 ⑴A:May I...? Can I/Could I...? B:Yes/Certainly/Of course. Yes, do please. OK/All right. ⑵A:Do you mind if I open the window? B:No, not at all. 或Never mind. 11.表示同意和不同意 (1):Certainly/Sure/Of course.Yes, please. Yes, I think so. All right/OK. That's a good idea. I agree with you. (2):No, I don't think so. I'm afraid not. I really can't agree with you. 12.表示肯定和不肯定 1: I'm sure. I'm sure that... 2: I'm not sure. I'm not sure whether/if... Maybe. 13.喜欢和厌恶 1: I like /love...(very much) I like /love to... 2: I don't like to... I hate to ... 14. 问时间、日期的应答 A:What day is it? B:It's Monday.A:What's the date?B:It's Jan. 10th. A:What's the time,please? B:It's five o'clock/half past five... It's time to ... 15.请求 (1): Can/could you...for me? Will/would you please do sth.? May I have...? (2): Please give/pass me... Please　20．劝告和建议 I think you ought to…我想你应该… If I were you, I’d…如果我是你，我会… It might be a good idea if you…如果你…这倒是个好主意。 Have you ever thought of…? 你是否想过要…？ I recommend that…我建议… I strongly advise you to…我极力主张你… You really ought to…你的确应该… Personally, I think you’d better…依我看，你最好… Why not do…? 为什么不…？ Why don’t you do…? 你为什么不…？ I suggest that…我建议… What about doing…? …怎么样？ How about doing…? …怎么样？ Shall we…? 我们去…好吗？ Let’s…, shall we? 让我们去…好吗？ You need (to)…你需要…21．禁止和警告 You can’t…你不能… You mustn’t…你不能… You’d better not…你最好不… Don’t…不要… Take care! 当心！ Be careful! 当心！ Look out! 当心！ If you…, you will…如果你…，你将… You are not allowed to…不允许你…

1.问候： ⑴A:Good morning/afternoon/evening. Hello/Hi. How do you do ? Nice to meet you. B:回答相同 ⑵A:How are you? B:Fine, thank you.And you? Very well,thank you. 2.介绍： ⑴This is Mr/Mrs/Miss...⑵ I'd like you to meet my parents.⑶ My name is....I'm a student. 3.告别 A:Goodbye.See you later/tomorrow. Good night. B:回答相同

20、(1)c、d、f　 (2)蔬菜或水果

19、(1)化石，　 CH₄ +　 2 O₂　 ^点燃 CO₂　 +2H₂O　 (2)②④

18、(1)0.4%　 (2) C₆H₈O₆ 　176　 凉拌、生食　 避光、避热、密封

17、(1)涤纶(2)汗水中含有盐(或氯化钠)，水分蒸发了，但盐分(氯化钠)留在衣服上形成白斑。(3)钙(Ca)

16、(1)有机物；3；17∶1∶8　　 (2)c