The key__sucess lies in persistence and hard work A to B of 请问选哪个啊.最好给解释下为什么,
问题描述：
The key__sucess lies in persistence and hard work A to B of 请问选哪个啊.最好给解释下为什么,
答
to,一个钥匙配一把锁,类似这种成对的东西,用法都是to,不论真正的key to lock,还是它的比拟用法,key后面只用 to