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Inordertosaveenergy,manyfactorieshavebroughtinsome

問題詳情:

Inordertosaveenergy,manyfactorieshavebroughtinsome

In order to save energy, many factories have brought in some ____ machines.


ctive        B. expensive              C. efficient                     D. extreme

【回答】

C

知識點:形容詞

題型:選擇題

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