Unit one：
场景： 学校课程
单词： subject， geography， science， etc.
句型：what is your fovourite subject？
On which side is the music room？
语法：1.定语从句、状语从句：
When you pull the letter out of the bag， say three words with this letter.
Best friends like to stay with you no matter if you are rich or poor.
A best friend is someone who keeps secrets.
2.介词后动名词：
Can you go to each class without passing any class twice？
This is great game to play with your friends， with everyone taking a turn.
3.过去分词做定语
Best friends think you’re the coolest-even when you have a piece of egg stuck in your teeth all day.
People in your group stay together and make a short story with all the given sentences.