1. The text is about a new worldwide digital library. It has opened on the Internet. The digital library lets people see rare items from around the world, including some of the earliest written works.
2. 4-й абзац.
3. Visitors search the library in different ways. They can enter historical dates to see what items were made in the world at that time. They can also sort their searches by similar topics or by the country.
4. It is a good idea to create such a library because it can be used everywhere to discover more about the world’s cultural history.