单句改错。 1. He is still afraid of fly in an airplane . A B C D ( ) 2. Jill could play piano when she was a child. A B C D ( ) 3.He use to play the chess . A B C D ( ) 4. Do you use to go to work on foot ? A B C D ( ) 5. He went out with the room light in last night . A B C D ( )