在下面—段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过15个字。

    谚语有云：“予人玫瑰，手有余香。”然而，①____，这样做是因为我们还没有认识到，给予是世界上最强大的力量，它对健康的好处超过你的想象。给予不仅能让人获得快乐、幸福的正面情绪，而且还能保护心脏，提高免疫力，降低抑郁和自杀风险，延长寿命等，总之，②____。其实，只要愿意，③____，你可以做慈善，帮助困难之人，你可以常怀感恩之心，谅解和尊重别人，你还可以绽放一个动人的微笑，说出一句由衷的赞美。

平均每行站____人？

Dear Cindy，

    Thanks for your letter. I miss you very much. It's always nice to hear from you.

    Today is the last day of my exams(考试). The math exam is very difficult, but the other exams are easy. I'm waiting for the summer holiday now. I'm  very excited，because I am going to see you and to be with you again.

    I'm  going to spend my summer holiday in New York with my sister. So we can play together again. I will enjoy our time together. I'm  going to watch football games with you. I think we will have a good time.

    I'm  going to the supermarket later on(过一会儿). I'm  going to buy some presents for you. I  hope you will like them.

Yours，

Jim