为什么是on one's bike（plane）,in one's car?

为什么是on one's bike（plane）,in one's car? 英语中by car=in one’s car,还是on one’s car.学校老师讲的是on,.做的一个完形填空是in in one's car为什么等于by car? 是in one's life还是on one's life by one' car和in one‘s car的区别 one on one's 请问,on one’s bike等不等于take a bike? clean one's car on one's work 还是 in one's work "in one's way to" or"on one's wayto"? on one's way 还是 in one's way正确? in one's holiday还是on one's holiday,Why