The company’s______use of energy has saved much expense and has been a model for

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问题 The company’s______use of energy has saved much expense and has been a model for many other businesses.

选项 A、economize
B、economy
C、economical
D、economist

答案 C

解析单词形态：形容词1．选项均为economy的不同形式，本题考查单词变形。2．空格处需要填一个修饰use的形容词。选项中economical是形容词，因此(C)为正确选项。

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