1：Haveyouevervisitedthe2010shanghaiwoldexpo?yes,whenIwasinChina,IittwiceA,visitedB,havevisited.答案给的是B,为什么不选A

Question

1：Have you ever visited the 2010 shanghai wold expo?
yes,when I was in China,I ___ it twice
A,visited B,have visited.答案给的是B,为什么不选A

Answer 1

我觉得答案应该是A,因为 when I was in China明确表示了过去的时间,
例如 In 2010,I visited it twice .
本句如果没有 when I was in China,倒是可以直接回答,yes,I have visited it twice.指到目前为止我参观过两次