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When the limestone or other carbonate rock just below the ground surface dissolv
When the limestone or other carbonate rock just below the ground surface dissolv
游客
2023-10-15
56
管理
问题
When the limestone or other carbonate rock just below the ground surface dissolves naturally, ______collapses and forms sinkholes.
选项
A、a land
B、the land
C、the lands
D、lands
答案
B
解析
句意:当在地表面的石灰岩和其他的碳酸岩自然风化后,大地便会倒塌,形成灰岩坑。后空格后的collapses可知,此处的名词需为单数形式,又由于此处特指大地,故需用定冠词the。故选项B正确。
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