题目内容：

书面表达

假如你是David，你的同学Vince邀请你去参观他家的农场(farm)，但你因为太忙而不能去。请根据以下提示写一封80词左右的电子邮件。

提示：今天是星期五，放学后你要去看望祖父母。第二天上午得帮爸爸在花园里干活，下午和妈妈一起去购物。星期天上午要为物理测试做准备，晚上与朋友们去听音乐会。

Dear Vince,

Thank you for                                                                  

                                                                            

                                                                            

                                                                            

                                                                            

                                                                            

                                                                            

Write soon.

Yours

David