Question

----- Have you ever visited the 2010 Shanghai World Expo? -----Yes．When I was in China , I ____..

----- 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

Answer 1

B

考查时态。句意：你曾经参观过2010年的上海世博会吗？——是的。当我在中国时，我参观过两次。可知下文描述的是在过去某个时间发生的动作，故用过去时态。选B。