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Câu hỏi
Since this book was first published on 2006, over 50,000 copies have been sold.
Chọn phương án (A hoặc B, C, D) ứng với từ/cụm từ có gạch chân cần phải sửa

Since this book was first published on 2006, over 50,000 copies have been sold.

Đáp án đúng là: B