One-to-two is great. First, you don’t have to sing all the time during class, which can give your voice a rest; second, you can observe your classmate’s state during class and study how he understands the teacher. teaching, how to implement the key points mentioned by the teacher. When you are alone, there is no time to think. When others are singing, it just gives you time to understand the teacher's explanation from another perspective. When the teacher explains it to your classmates, don't be idle, understand it with him, and then when he sings, think about how you would sing if it were you. , don’t think it’s a pity that having two people will reduce your own practice opportunities. In fact, I think that two people are better than one. Although you have fewer opportunities to practice alone, it gives you more time to comprehend. Probably more useful than what you've been practicing.