Ittakesmehalfanhour的精選

問題詳情：—Ittakesmehalfanhour_____playingthepiano.Howaboutyou?  —Iusuallyspend20minutes____it.A.practicing;on   B.topractice;in   C.topractice;on【回答】C知識點：動詞和動詞短語題型：選擇題...