Bộ ôn tập Từ cùng trường nghĩa môn Tiếng anh có đáp án (Part 7)

He didn’t cover up for his former friend because it was against his ______. A. etiquette B. laws C. norms D. principles

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He didn’t cover up for his former friend because it was against his ______.

etiquette

laws

norms

principles

Giải thích

Chọn D