III. Choose the correct preposition/particle: 1. On/In/To my opinion, she looks great today. 2. The children look exactly as/like/- their parents.

Solution:

1. In my opinion, she looks great today.
2. The children look exactly like their parents.

Explanation:

• 'In my opinion' is a fixed idiomatic expression.
• When comparing two things or people, 'like' is used to show similarity. 'As' is used to describe a role or function. The dash '-' would imply no comparison word is needed, which isn't the case here.