A cat's ability to survive falls is based on fact.为什么用复数fall

A cat's ability to survive falls is based on fact.为什么用复数fall A cat is ability to survive falls is based on fact.falls是复数为 A cat's ability to survive falls is based on fact.可以改成A cat' a cat's ability to survive falls is based on fact 请问to survi a cat's ability to survive falls is based on fact.句型分析 A cat’s ability to survive falls is based on fact. 新概念3英语求解.-a cat`s abillty to survive falls is based on fact. There is a cat on the tree.(复数) 高中英语状语问题Based on the novel,the firm is popular.为什么用based on, He is on whom a responsibility falls. 为什么这里on到了wh The song _______ a well-known fable.这里用based on 还是is based o 英语翻译The ability to pay for use of computing resources on a s