Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

The detective asked Phil …………

• A. A. where was he staying at 9.00 last night.
• B. B. where had he been staying at 9.00 the night before.
• C. C. where he had been staying at 9.00 the night before.
• D. D. where had been staying at 9.00 last night.

Dịch: Thám tử hỏi Phil rằng anh ấy đã ở đâu vào 9h tối hôm trước.
last night trong câu tường thuật phải chuyển về the night before => loại A, D
Cấu trúc: asked smb Wh + S + V => C