This new type of car is fitted with an effective engine, which is______fuel.

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问题 This new type of car is fitted with an effective engine, which is______fuel.

选项 A、economic of
B、economized of
C、economical of
D、economist of

答案C

解析句意：这种新型汽车配备有高效发动机，可以节省燃料。固定用法题。be economical of为固定搭配，意为“节省……的”；economic：经济(学)的；economize：节省；economist：经济学家。

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