問題詳情

15. In 1939 the Ohio and Mississippi rivers overflowed _____ the worst flood everknown in the United States.
(A) the cause of
(B) which caused
(C) and caused
(D) they caused

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)