We have a book s __________ in the school library.

We have a book s __________ in the school library.
We have a book s __________ in the school library.

We have a book s __________ in the school library.
应该是store up,意思是收藏
We have a book store up in the school library.
我们有一本书收藏在学校图书馆了.

book sale：图书销售

show
句意为：我们在校图书馆有一次书展。
^_^

shelf

填sale,have a book sale是进行售书活动，所以整句的意思是我们在学校图书馆进行售书活动，或者是图书甩卖。