1. If school finishes early today, Kevin will ride a bike.

Question

2. If school finishes early today, Kevin will ride his bike.

(A bike or his bike? Which one is commonly used?)

3. If I miss so much school, how can I become a scholar?
(What is the meaning of 'school' here? Is it 'class' or 'lesson'?)

Answer 1

2 is more common.

3. Yes, in this sentence, school means classes or lessons.