读短文，完成题目。
Mrs Li is taking Sam to the zoo. They are on a bus. Sam is very happy. He puts his feet on the seat.
‘‘Don’t put your feet on the seat.” says Mrs Li.
Sam sits down. Now he is sleeping.
“Don’t sleep on the bus.” says Mrs Li.
Sam is unhappy. “Don’t do this. Don’t do that. “What can I do?”
1．Mrs Li is taking Sam to the ________.
2．They go to the zoo by ________.
3．Sam puts his feet on the seat.
Mrs Li says, “________”
4．Sam is sleeping on the bus.
Mrs Li says, “________.”
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