little is done to make dirty water clean before it goes into
little is done to make dirty water clean before it goes into
In some big cities,little is done to make smoke clean before
In some big cities,is done to make smoke clean before it goe
IN some big cities,__is done to make smoke clean before it g
It is wrong of them to ________ dirty water into the river o
The classroom is very dirty.it is hard to clean it和it is har
The water is not dirty but very ___(cold/clean)
Some of the water is clean,but the rest__________quite dirty
it's wrong to__the dirty water into the river
三道英语同义句转换1.Factories must now clean their water before it is
w_____:to make clean with water
Why is your bedroom so dirty?Sorry,mum.I ____ to clean it.[横