問題詳情

23. The major _____ behind global warming is the rapid increase in carbon dioxide (CO2) levels.
(A) prescription
(B) heritage
(C) culprit
(D) medication

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)