A. on
B. at
C. in
D. about
🧠 Explanation:
In “The teacher set some homework at the end of the lesson,” “at” is a preposition. For English students, this highlights grammar, making it a key topic for studying sentence structure, linguistic clarity, and communication. Prepositions show timing. Understanding this improves writing precision. It’s essential for mastering grammar in communication. Studying prepositions offers insights into how language conveys time, crucial for English, journalism, and communication.
