你可以把你一下子能想到的写进去,考试起来就简单了：
My dear sister Linna:
On behalf of my family,great honour to recept you invitation about enjoying Spring Festival this year.
How are you doing recently?Can you recommend the spring customs of Hainan? Firstly,we know too less about it.What's more,I also want to understand what gifts you are fond of. The last but not the least,Please do a favour about booking a room and recommend scenic spots there.
yours sincerely,
Li Hua