what is your nationality?------你的国籍是什么?
where do you come from?------你来自哪里?
what can I do for you?------我能为你做甚麽?
who is on duty today?------今天谁值日?
what are you going to do tomorrow?------你明天要干嘛?
do you have any water?------你有水么?
are you Mr.Smith,the engineer?------你是史密斯先生么,那个工程师?
how are you?------你怎么样?
how old are you?------你多大了?