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    When my parrot is hungry, he the cage his beak. A. knocks on;in; B. knocks at;of C. knocks on;with; D. knocks at;on 【查看更多】

     

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    When my parrot is hungry, he _____ the cage_____ his beak.
    [     ]
    A. knocks on…in
    B. knocks at…of
    C. knocks on…with
    D. knocks at…on

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