The Greens must have been to 2010 Shanghai Expo,-----they?A.

问题描述：

The Greens must have been to 2010 Shanghai Expo,_____they?A.hadn't B.didn't C.can't D.weren't
D 题干中算不算有明确时间啊?

1个回答分类：英语 2014-10-01

问题解答：

我来补答

您的这个题是2011安徽“江南十校”单选34题.该题答案应该是haven't妥当.根据该句意,如不是推测用法,则是"The Greens have been to 2010 Shanghai Expo,haven't they?"改为表推测也须这样考量.如纯粹指过去行为,该句又缺少过去时间.

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