第1个回答 2012-01-25
I'm very glad to receive your letter！本回答被提问者采纳
第2个回答 2012-01-25
Very pleased to receive your reply.
没法感叹。
第3个回答 2012-01-25
how happy to hear from you!
What a happy thing to hear from you!
第4个回答 2012-01-25
I am really glad to receive your reply!
第5个回答 2012-01-25
(I am ) Glad to have received your letter!