Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 6)

The animals appear to have worked out a way (78) ……………………unlocking the cases by jumping on them

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The animals appear to have worked out a way (78) ……………………unlocking the cases by jumping on them

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Giải thích

The animals appear to have worked out a way (78) of unlocking the cases by jumping on them;