阅读短文，判断正(T)误(F)。
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."
( ) 1. Mr Panda has a doorbell.
( ) 2. Bear can't hear the knock on the door.
( ) 3. Bear doesn't want to see Mr Panda.
( ) 4. If you visit Bear, you have to ring his doorbell.