A.He made roller skates.
B.He made shoes.
C.He made musical instruments.
D.He made wheels.
A.By skating into the room.
B.By playing the violin.
C.By dressing up strangely.
D.By brealdng a mirror at the party.
A.They couldn't be stopped.
B.They were too expensive.
C.They didn't roll at all.
D.They easily hurt others.