---How many arms _____ there? ----There _____ an arm.A. are, are B. is, is C. are, is
——What’s this? ——______ a key.
—What’s her name? —.
--Is this _______ pencil ? --No, it’s ______ eraser.
—What's this _____ English? — It's ____ apple.
We are in the same school,but in different grades.