John：I've been noticing recently quite a lot of black smokecoming out of the chimneys of that factory near our school，which really pollutes the air here.
Mary：Yes, does. But I heard recently that the (own)ofthe factory have promised to take measures to reduce their factory's pollution.
John：I hope they will keep their promise.
Mary：I think they will. I've been told that special machineis supposed to be fixed by the end ofthis year. It's said that the machine clean the dust out of the smoke before it goes into the air.
John：That's good. Dust is really (harm) to our lungs. I knowthat because my family lives near a steel factory with a chimney constantly(pour)out black smoke.
Mary：Oh, you live near the steel factory? Is it true that we shouldn't eat the fish from the lake near thesteel factory?
John：Yes，that's true—the lakehas been (pollute)by waste from the steel factory.
Mary：Why don't they do anything to clean up the pollution?
John：They always promise, never act. A bit of action is we need.
Mary:You're .
