choose the word or group of words that best completes each of the following sentences.
The committee has submitted its report .. the students' riot.
Answer Details
The word or group of words that best completes the sentence is "on."
Explanation:
The sentence is describing a situation where a committee has submitted a report about a student riot. The correct preposition to use when talking about submitting a report is "on." Therefore, the sentence should read "The committee has submitted its report on the students' riot." The other options ("for," "about," and "at") are not appropriate prepositions to use in this context.