keepcleanbecauseless的精选

问题详情：根据句意，用方框中所给单词的适当形式填空。keep,clean,because,lesson,wonderful1.Youcan_______thebooksforthreeweeks.2.Theparkisso_______!Iwanttovisitittomorrow.3.Wedon’thave_______onSundays.4.It...