209. The Senate approved immigration legislation that would grant permanent residency to millions of aliens currently residing here and if employers hired illegal aliens they would be penalized.
(A) if employers hired illegal aliens they would be penalized
(B) hiring illegal aliens would be a penalty for employers
(C) penalize employers who hire illegal aliens
(D) penalizing employers hiring illegal aliens
(E) employers to be penalized for hiring illegal aliens
141. Unlike transplants between identical twins, whose genetic endowment is the same, all patients receiving hearts or other organs must take antirejection drugs for the rest of their lives.
(A) Unlike transplants between identical twins, whose genetic endowment is the same
(B) Besides transplants involving identical twins with the same genetic endowment
(C) Unless the transplant involves identical twins who have the same genetic endowment
(D) Aside from a transplant between identical twins with the same genetic endowment
(E) Other than transplants between identical twins, whose genetic endowment is the same
此题og解释：In B and D the expression identical twins with the same genetic endowment wrongly suggests that only some identical twin pairs are genetically identical
（言下之意表明who的作用是非限定，解决了with的限定作用的问题）
两个who，按照og的意思 ，第一个是限定（句中意思：不是所有雇主都。。。），第二个是非限定（句中意思：所有twins都是same）
为什么这样呢？是不是who可以限定也可以不限定？ | 
