the Great Wall,Lesson 21 Look at the Photos,I am happy today,I was sad yesterday,am today,was yesterday,He is eight years old this year,He was seven years old last year,was last year,is this year,We were in China last week,We are in Canada this week,are this week,were last week,now,last year,yesterday,last week,was,were,am,is,are,2008,this year,today,this week,often,was,was,were,were,am,are,is,are,It _ sunny yesterday,I _ tired yesterday,They _ loud on the train last week,Everyone _
