80. (28763-!-item-!-188;#058&004022)
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
(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
答案D
A哪里不好?
A选项 I,前后时态不一致。过去完成时不对。
II.However 和Although重复。
III.dedicated(adj.解释为为某特殊目的设计的,专用的。)后置定语修饰four cable networks,而that dedicate themselves 意思不妥.
IV.Og上也说 ,at one time 不如once简洁。
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