问题
选择题
Three bridges ________ over the river five years ago.
A．built
B．build
C．were built
D．are built
答案
答案：C
题目分析：根据时间状语five years ago可知本句用过去时态，主语是动作对象，故用被动语态。选C。
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Three bridges ________ over the river five years ago.
A．built
B．build
C．were built
D．are built
答案：C
题目分析：根据时间状语five years ago可知本句用过去时态，主语是动作对象，故用被动语态。选C。