1. look out ( for… ) 小心…
同义: watch out ( for… ) / be careful ( with… )
2. thank you / thanks for ( doing ) sth. 因某事谢谢你
e.g. Thanks for your help. / Thank you for coming to see me.
3. take / show sb. around ( some place ) 带某人参观某处
4. Don’t mention it. 不客气
