178. In the last few years, the number of convicted criminals given community service sentences. which allow the criminals to remain unconfined while they perform specific jobs benefiting the public, have risen dramatically.
(A) sentences, which allow the criminals to remain unconfined while they perform specific jobs benefiting the public, have
(B) sentences, performing specific jobs that benefit the public while being allowed to remain unconfined, have
(C) sentences, performing specific jobs beneficial to the public while they are allowed to remain unconfined, have
(D) sentences which allow them to remain unconfined in their performing of specific jobs beneficial to the public has
(E) sentences allowing them to remain unconfined while performing specific jobs that benefit the public that
这道题看了大家的提问，现在把大家的疑惑总结一下，里面有我自己的解答，另外也发现了一些大家没讨论过的问题。在这里也同时请教一下：
1，用定从的which allow还是分词的allowing?
答：allowing好。1，法令法规用现分2，题目中的定从有两种形式：A非限定和D限定。A：sentences, which allow the criminals to remain...非限定定从表解释，只能修饰sentences.
D: sentences which allow them to remain ..限定定从表示限定、修饰。所以因为allow的形式是复数所以就不知道allow的主语是sentences还是criminals.所以错。
但是，注意到这里allow 的宾语是them(同A中的allow 的宾语是the criminal不同)，而them 的指代又只能是sentences和criminals.所以which allow them应该是意指sentences allow criminals, 而不可能是sentences allow sentences. 所以OG在解释D的错误的时候并没提D中定从的错误，OG可能也是考虑到了them。正如E中sentences allowing them to remain一样，这个them一定指代criminal.
不知道上面这个解释对否？当然一定会有人置疑：为什么which allow them不是意指criminals allow sentences?这个我也不知道，所以才会在这里繁琐的写出来嘛：）
2, OG 对BC的解释如下：In B and C the verb phrases (performing .. . ) do not clearly modify criminals, because another noun (sentences) intrudes, nor do the verb phrases clearly establish temporal relationships among events.这里不明白的是performing干吗要修饰名词啊，明明是现分表伴随嘛。还有这个verb phrases指谁啊？performing? Has risen?这些事情间有什么时间关系（temporal relationships）嘛？
我觉得对BC的解释应该是：有逗号的现分performing表示伴随主句谓动的发生而发生，或表示伴随结果。1，performing伴随has risen而发生，句意歧异，所以错。2，表示整句话的结果，句意仍歧异，所以也错。
呵呵，一口气写了这么多。嘿嘿。 | 
