问题
选择题
The old city wall ______ in the Ming Dynasty.
A．was been built
B．has been built
C．was built
D．had been built
答案
答案：C
考查时态和语态。句意“那些老城墙建于明朝。”根据句意可知，应该用一般过去时，wall和build之间是动宾关系，用被动语态。故选C。
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