开头：
1 How nice to hear from you again.
1 How nice to hear from you again.
2 Let me tell you something about the activity.
3 I’m glad to have received your letter of Apr. 9th.
3 I’m glad to have received your letter of Apr. 9th.
4 I’m pleased to hear that you’re coming to China for a visit.
5 I’m writing to thank you for your help during my stay in America.
结尾：
1 With best wishes.
5 I’m writing to thank you for your help during my stay in America.
结尾：
1 With best wishes.
2 I’m looking forward to your reply.
3 I’d appreciate it if you could reply earlier.
3 I’d appreciate it if you could reply earlier.
开头：
1 多么高兴再次收到你的来信。
2 让我告诉你一些事关于活动。
3 我很高兴收到你的来信，4月9日。
4 我很高兴听到你来中国访问。
5 我在写感谢你对我在美国逗留期间的帮助。
结尾：
1 最美好的祝愿。
2 我期待着您的回复。
3 我会很感激，如果你能提前答辩。
