你（Li Yuan）的班级即将组织一次郊游（picnic），请你给你的外籍教师（Steve）写封信，内容包括：邀请他参加此项活动；介绍活动的具体安排和内容（如时间、地点等）；告知需要做的准备（如着装、自备午餐等）；希望他参加并尽快给予答复。
Dear Steve,How are you? I am on behalf of the whole class to invite you to join us in picnic. We have also invited Prof. Chen and Ms. Zhou whom you are familiar with.The weather forecast reported that the following Sunday will be sunny, so we decided to have the picnic on that day at Chaoyang Park. There is no dress code, just in casual. The theme of this picnic is competition of self-made food. Just for fun. So, please bring some food that you made by yourself. If you can come, we can pick you up at 8 a.m. in front of our building at school.We are looking forward to your response, hope you can come!Cheers,Li Yuan
