－What ________I doing?guess!
You________ playing football.
A.am, are B. are, are C. am, /
Is this your cake ? ---Yes , ____ ____.
A. it is B. it isn’t C. this is
That’s _____ my lunch box .
A.is B. isn’t C. /
---What is it? -- _____ a _____ .
A. This; doll B. It’s ; doll C. That’s ; doll
---Is that your crayon? ---_____, it _____.
A. No ; is B. Yes ; isn’t C. No ; isn’t
This _____ a pencil.
A. ’s B. isn’t C. /