问题描述: they can't see clearly because their eyesight is poor改为简单句 1个回答 分类:英语 2014-11-14 问题解答: 我来补答 They can't see clearly because their eyesight is poor.They can't see clearly because of their poor eyesight.他们看不清楚,因为他们视力很差.because用于引导状语从句,because of后则是接词或短语. 展开全文阅读