– Do you know how many _____ a horse has and how many _____ a bee has?--- Of course, I know.A teeth, feet B tooth, foot C foot teeth D teeth, foot
—I think recycling books and paper is useful. —________
—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.