問題詳情

17. The sun and wind are two major sources of _____ energy that many countries around the world havebeen trying to develop.
(A) recycling
(B) reusable
(C) renewable
(D) returnable

參考答案

答案:C
難度:困難0.333333
統計:A(4),B(6),C(5),D(0),E(0)

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