The landscape of the American West was dramatically altered during the 20th century as a result of the______construction of dams

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问题 The landscape of the American West was dramatically altered during the 20th century as a result of the______construction of dams along major rivers.

选项 A、degenerative
B、widespread
C、advancing
D、extensive

答案B

解析 各项含义是:degenerative退化的;widespread分布广泛的;advancing高级的;extensive广泛的,深度的。
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