Unit 4,Then and now,A. Lets talk,lets spell,is - are - go - can - see - watch - read - look,was,were,went,could,saw,watched,read,looked,gym,last year,time,years ago,last month,火眼金睛：Read quickly(快速、正确地读出单词,months ago,grass,internet,dining hall,Review,stars,Can you see the stars during the day,Yes, I can,No, I cant,I can see stars at night,Do you know the name of this star,Its very easy,I can look it up on the Internet,look up 查阅,Internet 互联网,look it up on the Internet,look it up in the dictionary
