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合并句：.I am wearing a baseball cap because I’m going to play baseball.
合并句：The girl is sitting on the moon because she wants to pick the stars.
6.Show time
Look at the three pictures, students can make a dialogue by themselves
7.Competition
It’s a brainstorming.Students can practise use why ask and because answer any kinds of sentences.
Step 5 Homework
Ask three questions to your teacher ,your parents and your classmates .Write down the questions and the answers they give to you.