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There was a c________in the room.The mice there were a____of it.They were h________a meeting.They wanted wo think out a w______to do with the cat.A small mouse said,"Shall we tie a small bell around its neck?"The others asked,"Why?"The mouse said,"If we do so,when it comes near us,we can hear the s_____of the bell and run a_______ at once."The o____mice were very happy to hear it.They all said,"It's a good i___!"But w_____could go and t____the bell for the cat?None could think it out.