There is a widespread belief in the United States and Western Europe that young people have a smaller commitment to work and a career than their parents and grandparents and that the source of the change lies in the collapse of the "work ethic."
(A) a smaller commitment to work and a career than their parents and grandparents (B) less of a commitment to work and a career than their parents and grandparents (C) a smaller commitment to work and a career than that of their parents and grandparents (D) less of a commitment to work and a career than their parents and grandparents had (E) a lessening of the commitment to work and a career that their parents and grandparents had D,想问一下had 改did行不行?当初就是觉得用had 奇怪才没选的,因为have 在这里是实意动词,比较的时候不是应该用do did之类的代替吗?请指教 | 
