There are some s___in our school library.There are lots of books on them

问题描述:

There are some s___in our school library.There are lots of books on them

shelves shelf的复数

shelf; shelf 的复数形式应该为 shelves。

student学生

shelfs

student (学生)
整句是,There are some student in our school library.There are lots of books on them.