The articles in English are a/an/the at/a/the their/the/a .

The definite indefinite article is the. The definite indefinite article is a/an.

1. The Baikal is an beautiful place to see. a
2. The Niagara Falls are situated in the south of Canada. -
3. My sister is learning to play a piano at a music school. the
4. The Netherlands is the European country. a

As you know, Amazon is a an the biggest shopping platform in a an the USA. William was a an the seven-year-old boy when he bought a an the unusual thing there. He used his mother's credit card to buy a an the helicopter. It wasn't just a an the small toy helicopter. He bought a an the real one! Fortunately, a an the seller asked for the delivery address. He realised that the boy lived in downtown Detroit. No penny was spent and Amazon blocked William's account.

Another interesting selling story happened in New Jersey. A An The old 76-year-old Amanda tried selling things to pay off her husband's credit. She found a an the old mattress in a an the attic. A An The man from Texas paid $53 on eBay for it. A An The few weeks later, Amanda's husband asked her about a an the mattress. He explained that there was $350,000 hidden inside it. Eventually, they got a an the mattress back, but not a an the money.