01.Are you there? / Are you with me?
你在吗？/你在听吗？
02.What are you thinking?/ What is your opinion?
你在想什么?/ 你对这事怎么看？
03.How are you doing?/How are you?/How's it going?
你好吗？
04.Are you happy?/Are you having fun?
你开心吗？
05.You are kidding!
你开玩笑吧！
06.Are you busy? / Do you have time?
你忙吗？