He goes to school at 7:30 on his bike. 为什么要用on呢?

He goes to school at 7:30 on his bike. 为什么要用on呢? 并告诉我为什么这样做He goes to school at 7:30 _____ his bike.A.in B.on hi goes to school on his bike.on his bike\by bike有什么区别?为什么要用 He goes to school (on his bike )every day.on his bike tom goes to school on his bike.he p______ it in the bike sta He always goes to school on his bike.（同义句） He ____his bike__ He always goes to school on his bike.的同义句 Now he goes to school( )his new bike every day A:in B:on C:b Tom goes to school on his bike.的全文 .阅读判断 Tom goes to school on his bike. He usually goes to school by bike,sometimes on foot. I go to school on foot.She goes to school by bike.he goes to