ERROR SPOTTING — Identify the part (A–E) that contains a grammatical, usage, or spelling error. If there is no error, choose E (All correct). Sentence (split into parts): A) When I heard B) his vice C) I could not respond D) quickly

Introduction / Context:
This item checks confusable words that are homophones or near-homophones. “Vice” and “voice” have very different meanings; only one fits the auditory context of “heard”.

Given Data / Assumptions:

• Verb of perception: heard.
• Object needed: something that can be heard.
• “Vice” means immoral habit; “voice” is the sound produced by a person.

Concept / Approach:
Because “hear” relates to sound, the correct noun is “voice”. Using “vice” causes a semantic error. Spelling distinctions are essential in error-spotting problems, especially where context (auditory vs moral) resolves ambiguity.

Step-by-Step Solution:
1) Match verb semantics: hear → sound.2) Choose the object consistent with sound: voice.3) Correct fragment: “his voice”.4) Full correction: “When I heard his voice, I could not respond quickly.”

Verification / Alternative check:
Try paraphrase: “When I heard his vice” is illogical; a vice cannot be heard.

Why Other Options Are Wrong:
A) Subordinate clause opener is fine.C–D) Main clause and adverb placement are correct.

Common Pitfalls:
Confusing minimal pairs (vice/voice, affect/effect) under time pressure.

Final Answer:
B (Write: “his voice”)