根据首字母提示或用括号内所给单词的适当形式填空。
【小题1】Could you please ______（fold）your clothes?
【小题2】_______（early）kids learn to do housework, the better they will be.
【小题3】I think it’s _______（fair）to judge（评判）a person before you really know him.
【小题4】I was waiting for the bus when it _________（begin）to rain heavily.
【小题5】He _______（clean）his room at this time yesterday.
【小题6】Sandy went into her sister’s room without k______ on the door. That made her sister mad.