_____ carefully, Michael! There’s a school ahead.
-- Do you know _ her mobile phone?一 No, I think it cost her around 4000 yuan.
--You know a lot about Chinese history, don't you? --Yes, I China for a long time since 1998.
--Cathy, could you come to our art club tomorrow? -- .
-Why not _ the party till tomorrow? We have an exam today. --No problem. See you then.
-Is it polite to speak or laugh loudly ? -No, I don't think so.