摘 要: | Bear has a doorbell. If you visit him,you must ring his doorbell. One day, Mr Panda visits him. He knocks at his door. After a while, Bear shouts in the room, "Please ring the doorbell!" But Mr Panda doesn't hear it. He knocks again. This time, Bear opens the door and says, "Don't knock at the door. I can't hear. Ring the doorbell, please."B ear has a doorbell.If you visit him,you m ust ring hisdoorbell.O ne day,M r P anda visits him.He knocks at his door.A fter a w hile,B ear shout…
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