用am,is,are填空.1.excuse me!什么 this your eraser.2.

用am,is,are填空.1.excuse me!什么 this your eraser.2.用am,is,are填空.1.excuse me!什么 this your eraser.2.what 什么those 什么they birds.3.this 什么his ruler .whete什么my ruler.4.l什么inclass three.什么you in class three too.5.什么these her english books.6.those什么their pens.where 什么his pen.7.here 什么two pictures of my family.8.he什么myfriend .什么your friend a boy or a girl9.什么those maps?no they aren't .they 什么pictures.10.these 什么your orenges .here you什么