According to United States census data, while there was about one-third

of mothers with young children working outside the home in 1975, in 2000,

almost two-thirds of those mothers were employed outside the home.

A.    while there was about one-third of mothers with young children

working outside the home in 1975, in 2000, almost two-thirds

of those mothers were employed outside the home.

B.     there were about one-third of mothers with young children who

worked outside the home in 1975; in 2000, almost two-thirds

of those mothers were employed outside the home

C.     in 1975 about one-third of mothers with young children worked

outside the home; in 2000, almost two-thirds of such mothers

were employed outside the home

D.    even though in 1975 there were about one-third of mothers with

young children who worked outside the home, almost two-thirds

of such mothers were employed outside the home in 2000

E.     with about one-third of mothers with young children working out-

side the home in 1975, almost two-thirds of such mothers were

employed outside the home in 2000

答案是C，我估计可能是出于平行的考虑，C确实是唯一在结构上平行的选择

但是对OG熟悉的朋友应该都记得，OG上有大量的题目，因为原选项遗漏了转折项而被为认定错误

在这里原选项包含了明显的转折意味，但是C中转折词被完全放弃了

而保留了转折词然而不够平行的D却被保留下来（D似乎没有其他语法错误，读起来也大致通顺）

这是不是意味着平行的意义要大于转折语义的保留？

意见仅供参考

这里D选还有一点错误是there be句型少选

这在prep的语法中有说明..

大家看看work的修饰对象，好象又修饰children的嫌疑，如何区分到底是修饰women还是children呢？

感觉只有C中worked做主语的谓语，说的过去，其他的都不太好。大家看看

除了c都无法解决歧义的问题，比如d

even though in 1975 there were about one-third of mothers with young children who worked outside the home, almost two-thirds of such mothers were employed outside the home in 2000 可以理解成为三分之一的母亲有在外工作的孩子