Is this a teacher’s desk? ———Yes, A.it isn’t B.is it C.Yes, it is
_______tall building it is!
( )—________ we ask you some questions? —Sure, go ahead!
( ) —________ I finish the work today? —No, you ________.
( ) This book ________ Lucy’s. Look! Her name is on the cover.
( ) (7) John ________ come to see us tonight, but he isn’t very sure yet.