一
dear jack，
we will have a graduation ceremony next week.and i strongly suggest you attend.because this is a great honor to us .
二
letter of invitation 20th june,XX dear principal, we have received your letter of june 18 asking if we can sponsor the one-week art festival you are going to hold this summer. we are very interested in the art festival and fully understand your needs. unfortunately, as our company has a fixed budget for sponsorship this year, we are unable to help you, and new items will not beconsidered until next year. so, we suggest you contact us again in the coming year. still, we wish your festival a great success! yours sincerely,
