---Haveyouevervisitedthe2010ShanghaiWorldExpo?---Yes．WhenIwasinChina,I

发布时间：2020-08-07 04:30:29

---Have you ever visited the 2010 Shanghai World Expo?---Yes．When I was in China, I ________ it twice．A.have visitedB.visitedC.had visitedD.would visit

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B解析考察过去时态。
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