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最佳答案：a friend of my father’ssome old books of my elder sister’sa teacher of their’s不确
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最佳答案：在那边的足球是他们的.The football overthere is theirs.那个漂亮的吹风机不是我姐姐的,是他们的,我的好朋友.That nice
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最佳答案：this is her sisterthat is his motherthose are their parents(fathers and mothers)
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最佳答案：we are playing football.are they playing yoyo in the park?is that cat chasing a
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最佳答案：1.I have washed my shoes on the day before yesterday morning.2.Sue's sister cook
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最佳答案：there are four people in my family,my dad ,mum,elder sister and me.they all work