7. Many investors base their choice between bonds and stocks on comparing bond yields to the dividends available on common stocks. (A) between bonds and stocks on comparing bond yields to (B) among bonds and stocks on comparisons of bond yields to (C) between bonds and stocks on comparisons of bond yields with (D) among bonds and stocks on comparing bond yields and (E) between bonds and stocks on comparing bond yields with 答案是C,我选了E又错了,知道comparing和COMPARION的区别,COMPARING表动作,COMPRISON 表结果,但是还是错,在这里是怎么判断的呢?