假如你是美国来杭州的交换生Leo，现在居住在翠苑社区，你收到了来自翠苑社区居委会主任Tim的来信。请根据来信进行回复。Dear Leo,
Summer holiday is coming, so students are wanted to do some volunteer work in Cuiyuan Community. What do you think of volunteer work? If you have a chance to be a volunteer, what kind of volunteer work do you want to do? Besides, can you give some advice to children in our community on how to spend a meaningful and colorful holiday?
We sincerely hope you can join us together.
Yours,
Tim
注意：1)词数80左右。2)适当发挥，以使行文连贯。
Dear Tim,
Yours,
Leo
