( ) Lucy’s mother says she can have a trip ____ her birthday . A. in B. at C. on
( ) —How’s Joy’s skirt? —Her skirt is more beautiful than ________.
( ) These are ________ and ________ a rooms.
( ) This is ________ and ________ a room.
( ) Give me ________ book.
( ) What is the colour ________ the desk?