This is the best I could find for you
Answer:
an
Explanation:
The word idea starts with a vowel and the adjective needed shouldn't also end with a vowel. And in this case, you can't use a because it's a vowel. So, you use an.
Answer:
the pronoun is they
Explanation:
it's they because the sentence doesn't specifically say who 'they' is.
"Students"
I believe "Eigth-grade" is an adjective of sorts or a category, but it might also be part of the subject.
