Answer and Explanation:
<em>11. were painting / knocked</em>
<em>12. broke / was playing</em>
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<em>11. While Mengly and Solika were painting the walls, their dog knocked over the paint pot.</em>
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<em>11 is correct because it fits into the sentence, as well as number 12.</em>
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<em>12. Sreynuth broke her leg while she was playing fribee.</em>
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<em>Hope this helps! <3</em>
