1) a: do you have some time tomorrow? 
    b: yes, i do. 
    a: how about having lunch with me? 
    b: good idea.

    a:明天有空吧? 
    b:有啊。 
    a:一起吃顿中饭怎样？ 
    b:好主意。

    2) a: if you‘re free, how about lunch? 
    b: when did you have in mind? 
    a: i was thinking about thursday? 
    b: that will be fine with me.

    a:有空的话一起吃顿中饭如何？ 
    b:你想什么时候呢？ 
    a:我看星期四怎样？ 
    b:没问题。

    3) a: i‘m calling to see if you would like to have lunch tomorrow. 
    b: i‘m sorry, but this week isn‘t very convenient for me. 
    a: perhaps we van make it later. 
    b: that would be better.

    a:我打电话给你，是想知道明天一起吃顿中饭怎样？ 
    b:对不起，这个星期我都不方便。 
    a:那么，也许改天吧。 
    b:好啊。

    4) a: i‘m calling to confirm our luncheon appointment. 
    b: it‘s tomorrow at twelve o‘clock, right? 
    a: yes, that‘s right. 
    b: i‘ll be there.

    a:我打电话来，是想确定一下我们约好吃饭的事。 
    b:是明天12点吧？ 
    a:是的，没错。 
    b:我会去的。