用be動詞的正確形式填空.1this( )my mom 2 ( )you my classmate 3he ( )a g

題目：

用be動詞的正確形式填空.1this( )my mom 2 ( )you my classmate 3he ( )a good boy 4they students .
5.she their teacher .6how ( )tom fine.6mary and lily ( )friends.( )you ok?yes ,i am

解答：

this is my mom
Are you my classmate?
He is a good boy.
She is their teacher.
How is tom?
Mary and Lily are friends.
Are you OK