How long may I keep that book?
--_____ the bird?——It’s on the chair.A. What B. Where’s
–Is this your pencil?——_______________. A. Yes, it is. B. Thank you.
--_______________.——Yes, Miss Li.A.Please close the door. B. Where is it?
---This is you,Bobby.——Thank you.A.for B. Helen
--Is this ______ schoolbag?——Yes.A. me B. your