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最佳答案:used to do sth
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最佳答案:过去常常习惯于做某事 was used to
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最佳答案:过去常常做某事 used to do sth习惯于做某事 be/get used to sth/doing sth还有被用来做某事到底是那些be used to
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最佳答案:1.I used to do my homework with my best friend.2.there are billions of stars in
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最佳答案:1Table manners2.Exchange student in my life3.Took pains to do STH4.Is someone fe