Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 8)

His disappearance is very strange, in fact quite ……………

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His disappearance is very strange, in fact quite ……………(explain)

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Giải thích

His disappearance is very strange, in fact quite inexplicable.