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

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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?

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.

The Greens must have been to 2010 Shanghai Expo,_____they?A. Greens must have been to Shanghai ,_____they?A.hadn't B.didn The Greens ______ (have) been to the Great Wall twice. how i wish i _________ go to the 2010 Shanghai World Expo .A have been to shanghai Shanghai will host the 2010 World Expo.The World Expo has a The Greens have just reached Shanghai for a trip.They are lo I have been to Shanghai -Have you been to Shanghai? the world expo shanghai 2010 and l The 2010 World Expo is being_____in Shanghai it's a good feeling for people to admire the Shanghai Expo t