◎ 题干
Although the Eiffel Tower _____ to last for 20 years, it is still standing today.

A. has designed    
B. had designed    
C. is designed      
D. was designed
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Although the Eiffel Tower _____ to last for 20 years, it is still standing today. [ ]A. has designedB. had designed C. is designed D. was designed …”主要考查了你对  【一般过去时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。