Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 1)

He is a …………………..…………. scientist although he is still young. (know)

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He is a …………………..…………. scientist although he is still young. (know)

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Giải thích

He is a  well-known scientist although he is still young. (know)