— What are those?— .A. Those are books. B. They are books. C. It’s a book.
---______the door please. ---- Please come in. The door______.
----What does Mrs Li teach? ----She is______ English teacher, and she teaches ______ English very well.
---- Who ______ the room? ----My brother______.
It’s popular to use QQ to ______with each other on the Internet now.
---May I have______milk, Mum? ----There isn’t______ milk in the fridge. What about______ orange juice?