booksale是可数名词吗

book sale是可数名词。
例句：
Its time for the annual book sale、
这是一年一度的图书促销时节。
Please e to our book sale next month、
敬请光临敝店下月的图书大促销活动。

Our school is having a book sale next week、

我校下星期将进行图书廉价出售。

Our school is having a book sale next week、

我校下周将举行图书廉价出售。

One day, I donated most of the paperbacks to a book sale、

一天，我将绝大部分的平装书捐给了一家二手书店。