During the Civil War, Steam Boating on the lower Mississippi River was ________．

During the Civil War, Steam Boating on the lower Mississippi River was ________．

A.ruined

B.delayed

C.destroying

D.damaging

答案及解析： A

解析：

本题意为“在美国内战期间，密西西比河下游进行的轮船比赛被破坏”。delay意为“推迟”，destroy意为“完全损坏”，damage意为“损坏”。此处须用被动语态。