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    - Have you ever visited the Water Cube? -- Yes. When I was in Beijing, I it twice. A. have visited B. visited C. had visited D. would visit 【查看更多】

     

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    —Have you ever visited the Water Cube?

    —Yes. When I was in Beijing, I ________ it twice.

    　 A．have visited　　　 B．visited　　 C．had visited　 D．would visit

     

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