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    We should study the new traffic rules and 1earn how ourselves. A. protect B. to protect C. protecting D. protected l0. Someone the classroom. Look! How clean it is! A. has swept B. is sweeping C. are sweeping D. have swept 【查看更多】

     

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    We should study the new traffic rules and 1earn how___________ ourselves．

    A．protect           B．to protect         C．protecting         D．protected

     

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    We should study the new traffic rules and 1earn how___________ ourselves．

    A．protect           B．to protect         C．protecting         D．protected

     

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    We should study the new traffic rules and 1earn how___________ ourselves．

        A．protect          B．to protect      C．protecting        D．protected

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