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The permanence of dams have already constructed must be ensured, by carrying out
The permanence of dams have already constructed must be ensured, by carrying out
游客
2025-01-28
37
管理
问题
The permanence of dams
have already constructed must be ensured
, by carrying out whatever can be done to stop erosion.
选项
A、has already been constructed be ensured
B、already being constructed must be ensured
C、already constructed must be ensured
D、must be ensured constructed
答案
C
解析
句子主语为The permanence of dams,画线部分出现两个渭语动词,constructed和must be ensured,但二者逻辑主语不同,被建造的是大坝,需要确保的是大坝的持久性。A出现两个主语不一致的谓语动词。表示“已建好的大坝”应是the dam constructed,而B中用进行时,不符合句意。D中be ensured后直接跟另一个动词constructed,不符合语法。因此,选C。
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