实践,实际,练习,实用的,实际的(practice)____makes perfect.
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实践,实际,练习,实用的,实际的(practice)Knowledge without ____makes but half an artist.
实践,实际,练习,实用的,实际的(practice)He is ____the piano now.
实践,实际,练习,实用的,实际的(practice)They are ____singing the new song.
实践,实际,练习,实用的,实际的(practice)The paper seems to me of no ____importance.