I don’t really know this one?! But I think this might be similar to your answer if not just go over the book <3!
1. C
2. B, because instead of a comma, a semicolon (;) should be used
3. A, because it is incomplete
4. A
5. C
6. A
7. C
8. B
B. might ride because a adverb provides, modifies or describes a verb in a sentence