What can be done to help people with eye problems?They can be

问题描述:

What can be done to help people with eye problems?They can be
A.operated on B.do operations C.performed operations D.cure or treat for free
要理由

A.operated on
operate on sb 给.动手术

为什么不用cure or treat for free1. 首先,这是被动句,be 动词后要接过去分词, 而cure or treat 是动词原形2. cure 治愈, 强调结果, treat 治病, 强调动作, 这两个放在一起有点不知所云