12)
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。

13)
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。

14)
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。