A1
used before nouns to refer to particular things or people that have already been talked about or are already known
Dictionary examples:
The teacher lost the homework again. (0.0)
The dog ate the homework, really! (0.0)
The man forgot the keys again. (0.0)
I bought a shirt and some shoes. The shirt was expensive, but the shoes weren't. (9.0)
I really enjoyed the book I just read. (12.3)
I'll pick you up at the station. (18.1)
Could you pass the salt, please? (29.2)