【題目】They do not provide a _______ energy supply.

A. stubborn B. stainable

C. sustainable D. containable

【答案】C

【解析】

考查形容詞詞義辨析。句意：它們沒有提供可持續(xù)的能源供應。stubborn頑固的，頑強的；stainable可染的；sustainable可持續(xù)的；containable可控制的。分析選項可知C項符合題意。

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