题目内容：

she bought the bike which cost most in that shop中的which为什么做宾语

优质解答

她买了那家店里最贵的自行车.
把状语"cost most in that shop"去掉,就是she bought the bike.
she 是主语
bought 是谓语
bike 是宾语
which 引导的从句是用来修饰宾语"bike"的
这样应该比较好理解吧