I think it is a or b but this is not exactly one of my strengths.
A. because a teacher would at some point help the student with his work
We can write the correct prepositions to complete the sentences in the following manner:
- Enthusiastic about is similar to interested in.
- Bad at is the opposite of good at.
- Stressed out = worried about.
- Keen on means you really like something.
<h3>What are prepositions?</h3>
A preposition is usually a short word employed to make a connection between or establish a relationship between ideas. Examples of prepositions are:
To answer this question, we must know what preposition usually go with what verbs or adjectives. Let's take number 1 as an example. The adjective "enthusiastic" is accompanied by the preposition "about", whereas the adjective "interested" is accompanied by "in".
Learn more about prepositions here:
brainly.com/question/21537048