A. for
B. At
C. Of
D. as
🧠 Explanation:
In “Train reached __ 9 o’clock,” the preposition “at” fits, indicating time. For English students, this highlights preposition usage, making it a key topic for studying grammar, linguistic clarity, and sentence structure. “At” ensures temporal accuracy. Understanding this improves writing precision. It’s essential for mastering grammar in communication. Studying prepositions like “at” offers insights into how language conveys time, crucial for English, journalism, and communication, ensuring clear expression in academic or professional contexts.
