新概念4的句子19课

题目

新概念4的句子19课
It is fairly clear that sleeping period must have some function,and because there is so much of it the function would seem to e important.1so much of it 这里的it指的什么 2of去掉不行吗 3还有 it 和the 之间难道不需要标点符号隔开吗

答案

1. it指sleeping period
2. of不能去掉
3. it和the之间确实需要标点符号,应该加个逗号