【下列句子中均有一处错误,请找出并在后面的横线上改正.要答案还有哪里错了?1.Cathycan'tgotoschoolalone,becauseheristooyoung.__________2.CanyoupassthesalttoIcan'treachit.__________3.Benmadeacakebyhimy】

　　下列句子中均有一处错误,请找出并在后面的横线上改正.要答案还有哪里错了?

　　1.Cathycan'tgotoschoolalone,becauseheristooyoung.__________

　　2.CanyoupassthesalttoIcan'treachit.__________

　　3.Benmadeacakebyhimyesterday.__________

　　4.whenyoufinishreadingthebooks.pleaseputtheybackontheshelf.__________

　　5.kids,helpyourselftothesweets!__________