你(Li Yuan)和几个朋友约定明天在人民公园野餐。你们的朋友Peter也应邀参加。你给他写封信，内容包括：
（1）说明野餐目的。
（2）说明路线。
（3）说明日期、时间。
Dear Peter,
We're so glad you're coming to join us tomorrow. Here is how you can find us. We'll have our picnic in the People's Park. You know where it is, don't you? After you enter the park by the main gate, walk straight on till you come to a stream. Cross the stream and turn right. After walking for a while you'll come to a lake. We'll have our picnic there in the small woods by the lake. I'm sure you'll have no trouble finding us. Do come!
Li Yuan
