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  • 1. 介词填空

    in   on  of   from  to  at

    1. (1) Bring the four piecesstring together and tie thema small toy.
    2. (2) Throw up the toythe air.
    3. (3) The smokethe cars and buses.
    4. (4) Lookthe black smokethe factory.
    5. (5) Let's gothe park.
    6. (6) The air is dirty the street.

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