Dear, I’m writing to invite you to.(发出邀请) There are some points you may want to know about. (活动主题)During ________, we will have lots of activities you are interested in.(活动的具体内容)First,.(活动介绍一)Second,.(活动介绍二) I believe that you will be very interested in . For one thing/First, ________. For another/Second, ________(受邀人参加的理由) Since the ________ will begin ________, is it possible ________? I really hope you can come/I’m looking forward to ________.(提出希望) Yours ________