1. my her theirs
2. mine hers
3. theirs their
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We always celebrate our mother's birthday. It's in September, Autumn. I usually decorate our house, grandma cooks a cake and a special meal. My twin brothers prepare special party decorations. We wear beautiful clothes, and buy mum some roses and sing her favorite song.
2) sink , так как в переводе "смыв, раковина", что никак не связано со спортом