----- Have you ever visited the 2010 Shanghai World Expo? -----Yes.When I was in China , I ____..
-----Haveyouevervisitedthe2010ShanghaiWorldExpo?-----Yes.WhenIwasinChina,I______ittwi...
----- Have you ever visited the 2010 Shanghai World Expo? -----Yes.When I was in China , I ______ it twice. A.have visited B.visited C.had visited D.would visit
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