13。State officials report that soaring rates of liability insurance have risen to force cutbacks in the operations of everything from local governments and school districts to day-care centers and recreational facilities. (A) rates of liability insurance have risen to force (B) rates of liability insurance are a force for (C) rates for liability insurance are forcing (D) rises in liability insurance rates are forcing (E) liability insurance rates have risen to force 如何在B和C中确定正确答案呢?og解释中说:In choices A and B, rates of is incorrect; when rates means “prices charged,” it should be followed by for. ![](/static/legacy-emoticon/Dvbbs/em06.gif) "prices charged"是什么意思啊?为什么这种情况下,rates后面要加for? |