55. Many house builders offer rent-to-buy programs
that enable a family with insufficient savings for a
conventional down payment to be able to move into
new housing and to apply part of the rent to a
purchase later.
(A) programs that enable a family with insufficient
savings for a conventional down payment to be
able to move into new housing and to apply
(B) programs that enable a family with insufficient
savings for a conventional down payment to
move into new housing and to apply
(C) programs; that enables a family with insufficient
savings for a conventional down payment to
move into new housing, to apply
(D) programs, which enables a family with
insufficient savings for a conventional down
payment to move into new housing, applying
(E) programs, which enable a family with insufficient
savings for a conventional down payment to be
able to move into new housing, applying
OG 中的解释：关于E Th e comma after programs is incorrect
because the clause is meant to be restrictive;为啥这里必须是限制性的呢？把后面这个句子去掉，前面半句的意思也很完整啊？！（如果不考虑这项的其他错误的话）作者: missouyangs 时间: 2010-6-6 08:30
Many house builders offer rent-to-buy programs that enable a family with insufficient savings for a conventional down payment to move into new housing and to apply
that从句修饰programs，是句子里不可缺少的一部分，少了这一部分句子意思严重不完整
而lz再换上which试试看，把which后面的内容去掉后，这句话还有什么啊？就完全表达不出原句的意思啊，很重要的内容都给省去了。
Well,the last post to end the day~
首先，单看which……housing部分，正如小天使所说，语法上完全没有问题。这不是一个正确性的选择，而是在考有效性(effectiveness)，我更愿意把此题的OG解释分类为Trifle mistakes,因为语法使用符合规则。
如果偏要鸡蛋里挑下骨头，就是E选项which……违反了忠实原文的解题原则。限定性与否其实是有subtle的差异的，具体表现为：that引导的限定性从句有强调其内容的感情色彩，而which没有。且原文把that列在主句中，而E选项将原主句内容划分为从句，使其身价大跌（从句重要性<主句），一定程度上改变了原文的意思。这也就是OG所述的“is meant to”，原作者的初衷。
Anyway,毕竟是Trifle mistakes,光凭这一点判断过于武断，这也就是为什么GMAT另加了一个Applying……来拉大与正确选线间的距离。作者: anchoretes 时间: 2010-6-12 06:43
