My sister wants to be t_____,so she takes exercise every day.

题目

My sister wants to be t_____,so she takes exercise every day.
最好说明原因，把要填的这个单词与下文结合着解释~

答案

My sister wants to be thin_____,so she takes exercise every day.
我姐姐想要变瘦,所以她每天锻炼
【补充】不能是thinner,因为不存在比较的对象
不能是tall ,因为锻炼不能让人变得高起来