——,glasses can correct most sight defects in healthy eyes 为什么填when well fitted
问题描述：
——,glasses can correct most sight defects in healthy eyes 为什么填when well fitted
答案中有个fitted 为什么不能选
Given the opportunity,he would do better.为什么这里的when就可以省略?
答
时间状语从句,如果用 fitted 的话,前面要有BEING