Bộ 10 đề ôn thi học sinh giỏi Tiếng anh 9 năm 2023 có đáp án (Đề 7)

The question was so difficult that no one could answer it. (such)

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The question was so difficult that no one could answer it. (such)

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Giải thích

It was such a difficult question that no one could answer it.