I need help, those fluent in Spanish.

16: D; hermano mayor
17. B; nuestros
18: A; mi
19: D; tienen
20: A; First person singular (I'm not very sure about this one so feel free to skip it for now)
21: B; tienes
22: A; tus
Answer:
16) D
17) D
18) A
19) D
20) B
21) B
22) A
Explanation: