Susan asked, "How long did it take you to finish your assignment last night?"

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Susan asked how long it had taken me to finish my assignment the night before.

Susan asked how long it taken me to finish my assignment the night before

Susan asked how long did it take me to finish my assignment the night before.

Susan asked how long had it taken me to finish my assignment the night before.

Giải thích

Hướng dẫn giải:

Đáp án đúng: A

Câu tường thuật: lùi thì (did → had taken), đổi “last night” → “the night before”

Dịch nghĩa: Susan hỏi tôi đã mất bao lâu để hoàn thành bài tập vào tối hôm trước.