John：I hope they will keep their promise.

　　Mary：I think they will.I’ve been told that __4__ special

　　machine is supposed to be fixed by the end of this year.It’s said that the machine can clean the dust out of the smoke __5__ it goes into the air.

　　John：That’s good. Dust is really __6__ (harm) to our lungs.I know that because my family lives near a steel factory with a chimney constantly __7__ (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 the steel factory?

　　John：Yes, that’s true－the lake __8__ (pollute) by waste from the steel factory.

　　Mary：Why don’t they do anything to clean up the pollution?

　　John：They always promise, but they never act.A bit of action is __9__ we need.

　　Mary：You’re quite __10__.

　　答案　1.It/That　2.owners　3.to reduce　4.a　5.before 6.harmful　7.pouring　8.has been polluted　9.what/all 10.right/correct

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