标题: OG SC 90求助~~ [打印本页] 作者: fzynshl 时间: 2016-4-7 19:30 标题: OG SC 90求助~~ og的sc部分第90题：Prices at the producer level are only 1.3 percent higher now[ than a year ago and are going down, even through floods in the Midwest and drought in the South are hurting crops and therefore raised corn and soybean prices]. B.than those of a year ago and are going down, even though floods in the Midwest and drought in the South are hurting and therefore raising.
求问~~~为什么and therefore后面链接的不是一个句子在这里也是对的？