--- When did you buy this computer? It looks so new.--- I it for only a couple of days. My sister bought it for me as a birthday present.
—Where is Liu Xiang from? --He is from .
—Are there boats on the lake? --Yes, there are .
--Are there any halls in your school? ---
--Is your ball the door ?--No, it’s the chair.
My mother and Iat home today. A. be B. are C. am D is