Difficulty: Easy
Correct Answer: A soft voice behind me asked If I was alone.
Explanation:
Rules
Yes/No questions are reported with if/whether; pronoun "you" → "I"; auxiliary inversion is removed; backshift "are" → "was" after a past reporting verb; retain the source position "behind me".
Option analysis
(D) applies all correctly and reads naturally. ✅(A) Wrong structure; adds "what" and "there".(B) Keeps direct-question form and lacks "if/whether".(C) Unnatural phrase "from my back".
Final Answer
A soft voice behind me asked if I was alone.
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