The government ___ schools.

选择一项：

a.
supply free books with


b.
supplies free books to


c.
supplies free books with


d.
supply free books to

supply sth to sb “为某人提供某物”；supply sb with sth “为某人提供某物”。主语是第三人称单数，谓语动词相应地要用第三人称单数形式。Supply的第三人称单数形式为supplies。因此，此题选B，supplies free books to 最合适，句意为：政府向学校免费提供书籍。