为什么不选C？谢谢大家

fmsunny

Because the budget package in Congress promises a combination of higher taxes and
reduced spending that may slow economic growth, many in the credit markets wonder
whether the Federal Reserve will compensate and help the economy by keeping interest
rates low, or perhaps even if they push them lower.
A. by keeping interest rates low, or perhaps even if they push
B. by its keeping interest rates low, or perhaps even by their pushing
C. by keeping interest rates low, or perhaps even by pushing
D. through their keeping interest rates low, or perhaps even push
E. through their keeping interest rates low, or perhaps it will even push

fmsunny

答案是B。。。。但我想知道C错误在哪？谢谢大家

tuscan

我觉得就应该选C啊，B里面its和their完全解释不通

fmsunny

对啊，但是答案给的是B，新PREP破解

fudanwyh

i think C is correct

wkz502

C是对的。这题在各版主总结的PREP 2008的笔记里有出现：

考点：
1.    Or并列结构前后要平行对称
2.    动词优于one’s doing
3.    代词指代
4.    through和by的区别：表示“通过做B达成了A（A已经做到）”时倾向于through，表示“通过做B做A(A还在被做)”是倾向用by。
选项分析：
A.    Or前后不对称；they无所指，Federal Reserve为单数
B.    Its keeping不如keeping简洁有效；their指代错误
C.    Correct，or perhaps even前的逗号是强调作用
D.    Their指代错误；one’s doing不如doing简洁有效；Or前后不对称
E.    Their指代错误；one’s doing不如doing简洁有效；Or前后不对称；it很突兀，而且没有指代对象

sunshengkun666

答案是C