问题
选择题
Thousands of houses _______ by the floods in Guangxi last month.
A．destroy
B．destroyed
C．have destroyed
D．were destroyed
答案
答案：D
本题的含义是洪水冲毁了数以千计的房屋，主语是动作的承受者，故用被动结构，结构为be+过去分词，故选D。
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