7.听下面的对话,回答第13-15小题 13.How long did Vince skate today? A.About 4 hours. B.About 6 hours. C.About 5 hours. 14.When did Vince begin skating? A.At the age of 5. B.At the age of 6. C.At the age of 7. 15.Who gave Vince the first pair of skates(滑冰鞋 )? A.His father. B.His uncle. C.His grandmother.