Dear Lily,
My family and I 【am变为are】 really looking forward to your visit.
There are so 【much变为many】 things to 【do变为be done 】here.First of all we'll show you our town.It's quite small so it's easy to find your way around.Maybe we can have【增加a】 picnic in the park.It has a boating lake 【in去掉】 where we can row a boat 【until变为if 】you like.
Some things are very different 【in变为from 】your country.For a start the weather is 【unchangeable变为changeable】.So you'll need to bring clothes for warm weather or a raincoat just in case it rains.【Beside变为Besides】,the roads are always busy.
We【 hoped 变为hope】that you are going to have a wonderful time with us.Have a safe journey.