Răspuns:
1. A: Does Mia usually study in the evening?
B: Oh yes. Actually, she's doing her homework right now.
2. A: Is Jack playing basketball at the park right now?
B: I think so. He often plays there with his friends.
3. A: What are you doing right now?
B: I'm reading a book.
4. A: Is the library open on Saturdays?
B: Yes, but it is never open on Sundays.
Explicație:
Present simple: to express a habit (1A, 2B) or a schedule (4AB)
Present continuous: to express an action that happens at the moment of speaking (1B, 2A, 3AB)