Our new machines are much cheaper to run.A. effective B. efficientC. energetic D. enthusiastic 题目和参考答案——青夏教育精英家教网—

题目内容

10. Our new machines are much cheaper to run.

A. effective B. efficient

C. energetic D. enthusiastic

10. B考查形容词辨析。句意：我们高效率的新机器运行成本低多了。 effective有效的；efficient生效的，效率高的，有能力的；energetic精力充沛的；enthusiastic热情的。所以选B。

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