1.lf we love Shenzhen,we mush stop dunmping _____(dirty water and waste matter)into the river.

1.lf we love Shenzhen,we mush stop dunmping _____(dirty water and waste matter)into the river.
2.Wemust stop people from___(make sth dirty)our homeland.3The water is ___(flow quickly)down the mountain 4We should ____(do sth according to instructions)the rules in the classroom.5He is____(iourney)to the USA brought her happinrss.