Unit 4 Then and nowPart AWhat this?Its a star.We can see stars at night.Lets sing!Twinkle, twinkle, little star,How I wonder what you are!Up above the world so high,Like a diamond in the sky.Twinkle, twinkle, little star,How I wonder what you are!Wu Yifans grandpa is at Wu Yifans school now!They are talking about the schools then and now.What was Grandpas school like?Lets read and answer!There was no library in my old school.libraryThere were no computers or Internet in my time.InternetWe can lo
