选回答填空.Yes,I am、Yes,it is、Yes,they are、No,I'm not、No,it isn't

选回答填空.
Yes,I am、Yes,it is、Yes,they are、No,I'm not、No,it isn't、No,thye're not
1.A:Excuse me.Is this the math class?
B:( )and I'm your teacher.
2.A:Is my purse on the chair?
B:( )It's under the table.
3.A:Are these your glasses?
B:( )Thank you.
4.A:Hi.Are you in my math class?
B:( )And I'm in your English class,too!
5.A:Are these your keys?
B:( )My keys are in my pocket.
6.A:Excuse me.Are you Tomiko Sato?
B:( )My name is Michiko Tanaka.