Answer:
I think all the answers that make sense to me are all C
Explanation:
1. The adverb that modifies the verb is c) ever. Without it, it wouldn't be completely clear as to which time frame the speaker refers to. It may have been for example the last year, or in some other particular moment.
2. The adverb that modifies the verb is b) always. It adds to the sense of urgency of wearing a life jacket when rafting. Without it, the meaning of this sentence wouldn't be so precise.
I don’t understand your question ......
The correct answer is <span>c. Singular subjects have singular verbs.
Similarly to this, plural subjects must have plural verbs.</span>