Many oil companies are now making alternative energy ____in an effort to remain competitive in future energy markets.

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问题 Many oil companies are now making alternative energy ____in an effort to remain competitive in future energy markets.

选项 A、payments
B、contributions
C、donations
D、investments

答案D

解析通过分析句子，空格处应填入“投资对象”的单词。

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英语

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