[問題]Prep-T2-Q80

[scottkidd]

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

Ans: D

看起來，
(A)有問題在：(1)although和however意思redundant；(2)句子前半段用過去完成式，後面又馬上跳現在式；
(B)有問題在：with的用法
(E)有問題在：句子前半段用過去完成式，後面又馬上跳現在式

我又覺得(D)Children’s programming was... , but now there are...，but前後沒有平衡，雖然(C)用there are開頭有點怪但還是選了(C)，請問該如果判斷？

[crazykai]

once放句首當conj. ， 表"一旦 "

所以(C)改變句意了

[chencraig0227]

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

Ans: D

看起來，
(A)有問題在：(1)although和however意思redundant；(2)句子前半段用過去完成式，後面又馬上跳現在式；
(B)有問題在：with的用法
(E)有問題在：句子前半段用過去完成式，後面又馬上跳現在式

我又覺得(D)Children’s programming was... , but now there are...，but前後沒有平衡，雖然(C)用there are開頭有點怪但還是選了(C)，請問該如果判斷？

(C) Once limited..., there...→沒有物件可以執行"limited"。(D)(E) 主要就差在時態。沒必要不使用過去完成式。