What’s this? __________.
A. It’s a ruler. B. This is a ruler. C. That is a ruler.
______ your sister? No, she isn’t.
A. Is he B. She is C. Is she
Would you like a pie? _________ .
A. No, thank you. B. I’m sorry. C. Yes, it is.
Is _____ rubber in the desk? Yes, it is.
A. your B. my C. you
Don’t sleep, Liu Tao. ________ .
A. Thank you. B. I’m sorry. C. Thanks.