A. till
B. Down
C. Into
D. his
🧠 Explanation:
In the phrase "His health is broken __ due to hard work," the preposition "down" completes the idiom "broken down," meaning deteriorated due to strain. Common in health or mechanical contexts, it conveys decline or failure. Proper preposition use ensures clarity in idiomatic expressions, vital for effective communication. This example highlights the importance of idioms in English, enhancing descriptive accuracy in writing or speaking, particularly when addressing physical or emotional states in personal or professional contexts.
