2．可根据内容要点适当增加细节，以使行文连贯。

　　3．参考词汇：二氧化碳—carbon dioxide；氧气—oxygen

　　Hello，every Senior Three student!

　　We are going to graduate from our school soon.

　　【参考范文】

　　Hello，every__Senior__Three__student!

　　We__are__going__to__graduate__from__our__school__soon.We have studied here for three years and we all regard it as our second home.We have planned to send a gift to our school.What about planting some trees?

　　We all know that trees can clean the air，and they can make our school more beautiful.Secondly，trees can absorb carbon dioxide and give out oxygen.Thirdly，the trees we are going to plant will grow up.Years later，when we come back to visit our school，they will remind us of the time when we studied in school.

　　So we think trees are the best gifts not only for our school but also for us.Let's start now!

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