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：句意：尽管埃菲尔铁塔被设计的初衷是屹立20年，但是今天它依然站立着。设计埃菲尔铁塔是发生在过去的事情，故用一般过去时，且“埃菲尔铁塔”与“设计”之间是被动关系，故用一般过去时的被动语态，选D。