A： What's your favorite season， Tim？

    B： （1）　　 Because in spring the weather gets warmer and warmer， and I can plant trees．

    A： （2）　　？

    B： Yes， we plant trees every year．

    A： （3）　　？

    B： Because trees are important to us． We should plant more trees and protect them well．

    A： Tomorrow is Tree Planting Day． （4）　　？

    B： Sure． Welcome to join us!

    A： （5）　　？

    B： Let's meet at the school gate at 8：00 a． m..