--Who is the boy over there?
--________ is my brother.
--Mom, I want to ask grandpa a question.
--Oh. ________ is reading a newspaper upstairs.
--Do you know about David?
--Yes, I know ________ very well.
--There is enough food for the birds, isn't ________?
--No. We need to get some.
--Yao Ming isn’t ________ overnight success.
--I agree with you.
--- ________ you been to the Great Wall?
---________, I haven't.
---Who broke the window?
---I ______.
--- What are Johnson's family like?
--- ________.