A. in
B. at
C. of
D. at
🧠 Explanation:
In “The teacher set some homework at the end of the lesson,” ‘at’ is correct. Knowing this helps students improve English grammar, ensuring clear sentences. Understanding prepositions is useful for essays, exams, or writing in school. This skill is key for English classes, helping students express timing accurately. Learning correct grammar enhances communication, making it easier to convey schedules in academic projects or daily scenarios where precise language improves clarity.
