31、假设你叫John，你和Tom是好朋友，他邀请你去参观他家的农场，你因为太忙，不能去。请根据以下提示写一篇60-80词左右的e-mail。

    提示：今天是星期五，晚上要去看爷爷奶奶。明天上午要帮爸爸在花园里干活，下午要与妈妈一起去购物。星期天要为汉语考试做准备，晚上要与朋友去参加音乐会。

31、Dear Tom，

  Thank you for asking me to visit your farm．I’d love to，but I’m afraid I can’t．Today is Friday．I’m going to see my grandparents this evening．Tomorrow morning I have to help my father work in the garden，and in the afternoon I am going shopping with my mother．On Sunday I have to study for the Chinese test．In the evening I’m going to the concert with my friends．Let’s make it some other time．

Write soon．

Yours，

                                                                   John