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最佳答案：once a weekonce two weeks
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最佳答案：once a weektwice a weekthree times a week这些是对的.其实once,twice就是one time/two time的简
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最佳答案：I take piano class once a week
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最佳答案：WenDi has violin classonce a week.
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最佳答案：How often do you water the flowers?Three times a week
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最佳答案：he promised to his parents that he would go back to see them at least once every
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最佳答案：every two weeks 每两周一次 once in a while 偶尔Twice a week once every other week
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最佳答案：I sometimes three times a week to see television.Internet twice a week,every day
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最佳答案：更正楼上翻译如下,保证准确率：1.Lily teaches me to read English three times a week.She hopes to
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最佳答案：during the past three years,he have met his wife occasionally once a week in onl