問題詳情
【題組】50.
(A)The ripples of rising corn prices have also spread beyond Amer ica＇sborders.
(B)Ethanol also can be made from materials such as wood and grasses.
(C)Just last year alone, the United States produced almost 5 billion gallonsof the fuel.
(D)The boom in corn demand helps boost the farm economies in many states
參考答案
答案：A
難度：適中0.648649
統計：A(24),B(1),C(10),D(2),E(0)