答：Dear Lucy,

We plan to go a nursing home on the Double Ninth Day, a festival day when every family come together to climb up the mountain and look at flowers, particularly to show their care and respect to the old member in the family. So we decide to visit the nursing home near our school to give some helps for the elderly.

I"d like to invite you to join us, and like to have your help too.

I"m looking forward to hearing from you.

Li Hua.