沁园净水器不出水了:we must （ ）from the old．。中间填写什么啊，急。。。

we must （ ）from the old．。中间填写什么啊，急。。。 So we must obey ......... We must listen to the teachers.(改一般疑问句） We must look for ways_____English. （ )from his accent,he must be America. we shoud ()from each other We must ask a doctor to come. We must ( )to school at seven thirty. we must study hard for the () must doing him we like stop this