问题
选择题
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
答案
答案：D
题目分析：考查时态与被动语态。Eiffel Tower与design是动宾关系，应该使用被动语态，排除A、B；设计埃菲尔铁塔的动作发生在过去，应该使用一般过去时，排除C。故选D。