manhanttan上第九章里面关于cost用法,有点疑惑,上面举例是: RIGHT:Pollution COSTS us billions IN increased medical bills. SUSPECT: The COST OF pollution TO us is billions IN increased medical bills. WRONG: Increased medical bills COST us billions BECAUSE OF pollution. 这个wrong的句子错在哪里?我觉得语法上没什么错误啊。还是不能说bills cost us?请高手指教~ 这节习语看得我头都大,看了一遍抄了一遍还是不记得,看来要多读几遍。