124.As business grows more complex, students majoring in specialized areas like those of finance and marketing have been becoming increasingly successful in the job market. (A) majoring in specialized areas like those of finance and marketing have been becoming increasingly (B) who major in such specialized areas as finance and marketing are becoming more and more (D) who major in specialized areas like those of finance and marketing have been becoming more and more 答案是B,没有问题
这里的A选项和D选项中have been becoming 时态肯定有问题,如果单从语法角度考虑,是不是因为从句中As business grows more complex,所以主句只能用一般现在或者一般将来???