问题描述：
根据句意,用合适的介词或副词填空
The cleaner clean ( ) the streets in the morningevery day
If someone falls ( ) a river ,we should try our best to pull him ( ) water
My father hit the dog ( ) a stick .lt just frightened me
The cleaner clean ( ) the streets in the morningevery day
If someone falls ( ) a river ,we should try our best to pull him ( ) water
My father hit the dog ( ) a stick .lt just frightened me
问题解答：
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