Answer:
1. He's a very talented boy. He plays the guitar, sings and .....
2. Does she speak Italian? - No, she's a ?/ the ? teacher of .....
3. She's an architect. She has her own company.
4. He plays basketball. He's really good at it.
5. The profession you've chosen is very difficult.
Step-by-step explanation:
In the case of sentence #2, without the end of the sentence that is cut off, I cannot say with 100% confidence that the correct choice is 'an' or 'the.'