That is only a five-yesr-old boy,but he can write and read.
注：five-year-old有连字符连着,所以当做一个单词看待
解释一下楼上的
一楼的：题目只有两个空,明显不对
二楼的：没five years-old这种用法
三楼的：和一楼的犯一样错误