补全对话题考的不是语法而是「得体」：别人说 Thank you，标准应答不是 That's all right 混答一气，而是分场景有固定搭配。情景应答靠语感不如靠清单，六大高频场景一表背完。
六大场景应答对照表
| 场景 | 常用表达 | 标准应答 |
|---|---|---|
| 问候 | How are you? | Fine, thank you. And you? |
| 初次见面 | How do you do? | How do you do? |
| 感谢 | Thank you very much. | You're welcome. / That's all right. |
| 道歉 | I'm sorry I'm late. | It doesn't matter. / That's OK. |
| 请求 | Could you help me? | Sure. / Of course. / No problem. |
| 告别 | See you tomorrow. | See you. / Goodbye. |
电话与购物等特色场景
- 电话自我介绍用 This is ... speaking：Hello, this is Mary speaking.
- 电话问对方是谁用 Who's that? 不用 Who are you?
- 请求允许：May I come in? — Come in, please.
- 提建议：Why not go with us? / What about playing football?
- 购物：Can I help you? — I want a pair of shoes.
- 看病：What's the matter (with you)? — I have a headache.
解题技巧：先看上下句各处在什么场景，再选「场景内」的表达；凡与场景无关、语法再对也不选。
易错点：How do you do 的回答还是 How do you do
How do you do 是初次见面的正式问候，不是真的提问，回答仍要说 How do you do，不能按字面回答 I'm fine。判断方法看场景：初识场合互道 How do you do；熟人见面才用 How are you 加 Fine, thank you。电话场景同理有专属规则：自我介绍用 This is，问对方用 Who's that，把面对面用语搬进电话里就错。补全对话题先判断「面对面还是打电话」，再套场景清单。