改错:you need to practice playing the violin every day.his father has been to America (twice) .对括号部分提问

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改错:you need to practice playing the violin every day.his father has been to America (twice) .对括号部分提问
改错:you need to practice playing the violin every day.
his father has been to America (twice) .对括号部分提问

改错:you need to practice playing the violin every day.his father has been to America (twice) .对括号部分提问
you need to practice the violin every day.就已经是连小提琴的意思了.
how many times has his father been to America?

你需要每天练习小提琴