問題詳情
17. Americans have come to fear the West Nile virus, ______.
(A) being transmitted by the common mosquito
(B) for transmitting by the common mosquito
(C) because it is transmitted by the common mosquito
(D) for being transmitted by the common mosquito
參考答案
答案：C
難度：適中0.432432
統計：A(9),B(5),C(16),D(5),E(0)