哪位好人帮忙解决一下!
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2014-01-20 · 知道合伙人教育行家
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12-20had,didn't help,Did---study,was,Did---see,did---work,did---buy bought was,Did--live ,is reading
21--30 are making,are playing, is reciting,is standing, are playing,am writing--is watching
Are--preparing, isn't doing---is playing,are leaving, am not going
21--30 are making,are playing, is reciting,is standing, are playing,am writing--is watching
Are--preparing, isn't doing---is playing,are leaving, am not going
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