who___clean the classroom yesterday?

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• 阅读选择：We have a nice classroom.The windows are big and the wals are white.There's a bigblackboard on the front wall.A big desk is near it.It is for our teachers.There's a map of China and some other pictures on the wall.There are forty small desks and chairs in the room.They are for students.There are sixteen girls and twenty-four boys in our class.There are some flowers on the teacher's desk.They're for our English teacher.She is  a good teacher and w
• The classroom is enough bright.Pleaseturn off the lights.怎么改?
• ___are big and bright.A The classroom's windows B The windows of the classroom
• 改错The (lights) (in) the classroom (is) (bright)
• Look!The classroom is big and bright的问句
• this is a bright classroom.(感叹句) ____ _____ bright classroom it is!
• 多么明亮的教室啊 —— ——a bright classroom —— ——the classroom is
• 先行词是the way,place,time,reason关系副、代词何时可省?为什么这句要加where:We've all used thermometers to measure temperature but sometimes we need to measure temperature in places WHERE you can't put a thermometer.语法说,先行词是the way,表示方式,可用that（可省）或in which来引导一个定语从句.如果先行词是时 间或原因,也可用that（可省）或when或why来引导定语从句.如：（1）This was the reason that/why he was late yesterday.（2）This is the last time that I shall give you a lesson.这句是道改错题,还要加上where 是什么原因?没表达清楚，我的意思是that代替关系副词，那么我这道改错题为何还要加
• 1.the carzy dog _____(bite)two boys the day before yesterday 2.we would like to go_____(野营)this weekend3.my father made me_____(set)my pet bird free4.the teacher told us the sun____(move)around the moon
• Don't（）in the classroom
• 一个直角三角形的两条直角边的和是14cm，面积为24cm2，求两条直角边的长．
• 物理一道测密度的题 在线等