12. hold on/hang on不要挂断 13. leave a message留言 14. take a message 捎口信 15. give sb a call / ring给某人打电话 16. The line is bad/ busy / engaged.电话占线 17. Who’s speaking?/Who’s that?请问是哪位? 18. Hello! This is …speaking 喂我是。。。 19. hold on, please...