17.聽下面一段材料,回答第18-20小題. 18.Florence Jackson won a competition when she was略years old. A.seven B.eight C.nine 19.Florence Jackson designed a coin for略. A.the 2012London Olympics B.the art competition in her school C.the talent show on a TV program 20.Florence Jackson was excited because略. A.she got much pocket money B.her picture turned into a coin C.she would take part in the Olympics.