1)Thanks.谢谢 2)I really appreciate it.很感谢 3)You're one in a million.你真是大好人 4)You're the greatest.你太好了 5)I'm truly grateful for your help.感激你的帮助 6)Your help was greatly appreciated.非常感激你的帮助 7)I'd like to express my gratitude.表达我的谢意