首页 > —Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I it twice.A．h

—Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I it twice.A．h

题目简介

—Have you ever visited the Water Cube? —Yes. When I served as a volunteer in Beijing, I it twice.A．h

题目详情

—Have you ever visited the Water Cube?
—Yes. When I served as a volunteer in Beijing, I it twice.

A．have visited	B．visited
C．had visited	D．had been visiting

题型：单选题难度：中档来源：不详

答案

B

考察时态。根据when I served as a volunteer,可知，该句主句用过去时，
句意为，---你去过水立方吗？--是的，当我作志愿者的时候，我去过两次。

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