Simply checking the "right" answer won't improve your grade. To get the most out of Set 2, try these steps:
If you're preparing for the HKDSE exams and are looking for practice materials: oxford essential hkdse practice papers set 2 answer
Note: If you have specific questions about why an answer is what it is, feel free to drop a comment below and let's discuss! Simply checking the "right" answer won't improve your grade