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    The parents waved and the train until it was out of sight. A. saw B. noticed C. observed D. watched 【查看更多】

     

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    The parents waved and _____ the train until it was out of sight.

       A. saw         B. noticed     C. observed      D. watched

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    The parents waved and _____ the train until it was out of sight.

    A．saw

    B．noticed

    C．observed

    D．watched

     

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