相关Ittakesmehalfanhour的文学知识

问题详情：—Ittakesmehalfanhour_____playingthepiano.Howaboutyou?  —Iusuallyspend20minutes____it.A.practicing;on   B.topractice;in   C.topractice;on【回答】C知识点：动词和动词短语题型：选择题...