問題詳情
【題組】49.
(A)Ethanol also can be made from materials such as wood and grass es.
(B)Just last year alone, the United states produced almost 5 billion gallonsof the fuel.
(C)That number will likely grow
(D)The ripples of rising corn prices have also spread beyond America＇sbnorders.
參考答案
答案：C
難度：適中0.513514
統計：A(1),B(15),C(19),D(2),E(0)