Read the definitions and choose the right variant.
1. A large, strong building or group of buildings that can be defended from attack:
2. An event at which objects such as paintings are shown to the public, a situation in which someone shows a particular skill or quality to the public, or the act of showing these things:
3. A building, room, or organization that has a collection, especially of books, for people to read or borrow, usually without payment: