He looks and he is looking at the picture.
—Where is David?—I think he________Australia.
—Have you packed the camera yet?—Yes,of course.I________it last night.
Homo erectus pekinensis(北京人)________in Zhoukoudian Village,on the Longgu Mountain,Fangshan District,Beijing.
Grandma________us stories when we were very young.
—________free education,the poor children in my hometown can go back to school.—So can the children in my hometown.