Answer:
here is the corrected way
Step-by-step explanation:
what did you do at 9 o'clock last night? i called you but nobody answered
Answer:the error would be "what did you do at 9 o clock last night ."
the correct appropiate wording would be "what were you doing.. at 9 o'clock last night ? i phoned you but nobody answered ."
Explanation: because its past tense
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