Cassie is a girl in Yuying Middle School. Her room is not tidy. It is in amess. Her mom asks her to clean(打扫) the room and Cassie asks Carl for help.
"Carl, can you come to my room now and help me clean it?" asks Cassie.
Carl is Cassie's brother. Carl's room is always tidy. His schoolbag is on the desk, the chair is under the desk and the radio is in the bookcase. He doesn't ask his mom "Where is my dictionary?" or "Where is my schoolbag?" He can always find his things in the room.