5、rsshouldfindvariousandeffectivewaystoteachdifferentgrammers.
Group
InChinaalmosteveryoneknowstheallusion:“Whenamonklivesalone,heneverworriesabouthavingwatertodrinkashehimselfhastosolvetheproblem.Whentwomonkslivetogether,theyhelpeachothertocarrywater.Butwhenthreemonkslivetogethert