21. I couldn't get through.(电话打不通。)
22. I got sick and tired of hotels.(我讨厌旅馆。)
23. Be my guest.(请便、别客气)
24. Can you keep an eye on my bag?(帮我看一下包好吗?)
25. Let's keep in touch.(让我们保持联系。)
26. Let's call it a day[决定或同意暂时或永久停止(进行某事)].
27. I couldn't help[避免;阻止] it.(我没办法。)
28. Something's come up[发生/出现].(有点事/出事了)
29. Let's get to the point[要点/核心问题].(让我们来谈要点。)
30. Keep that in mind.(记住那件事。)