[求助] GWD-TN-23 Q16: PP 52 (prep 52)

Although at one time children's programming had been limited to a few hours a week, now, however, there are at least four cable networks that dedicate themselves entirely to shows produced specifically for children.

A. Although at one time children's programming had been limited to a few hours a week, now, however, there are at least four cable networks that dedicate themselves entirely to shows produced specifically for children.

B. With children's programming having been limited at one time to a few hours a week, now at least four cable networks have dedicated themselves

C. Once limited to a few hours a week, there are now at least four cable networks with children's programming that dedicate themselves

D. Children's programming was once limited to a few hours a week, but now there are at least four cable networks dedicated

E. While children's programming had once been limited to a few hours a week, at least four cable networks are now dedicated

正解: (D)

我选了(E)

我想这里的意思有比较之前的状况和现在的状况

所以用while应该是很OK的

我对(D)中的”there are” 是否redundancy以及dedicate在这边不需要用被动式吗？

还是dedicate在这边用主动语气的道理就跟assemble一样？

不能光看主词是无生命的就一味的认为一定是用被动式？

恳求NN帮忙解惑~~~~

Had once been 没有根据？
            什么意思？

跟was once limited相较之下，不是都是表对过去的比较吗？

现在看(D)好点了 but可以有力的表达出contrast，也懂了dedicate在这边是省略形式…

谢谢你

继续讨论………….