A: Come , Daming. Run! Run!A. in B. at C. on
( )—What is thirty and twelve? —It’ s ___________.
( )—__________your brother here? —__________,he isn’ t here.
( )—__________the bike? —Look! It’ s under the tree.
( ) Jim and I__________ students. We__________in the same class.
( ) Lily is a new student.__________is English.