REMEO之语法天问（三）

以下是引用gemj在2003-11-18 23:22:00的发言：
4
我选的是B，我觉得B中 (already a solid part of the employee benefits package at many companies)是child care的同位语。
而且介词短语是不需要讲究逻辑主语的。
但我找了半天，没有找到这样的结构。不知是否行啊？
C的用法不行吧？这是什么语法现象？

以下是引用gemj在2003-11-19 0:09:00的发言：
不是，我的意思不是说child care作主句主语的同位语。是说(already a solid part of the employee benefits package at many companies)是child care的同位语。

以下是引用remeo在2003-11-18 17:28:00的发言：
就要考了，感觉还没上次的底气足，哎，还是恳请大家给点临终关怀吧？

4.  Child care already a solid part of the employee benefits package at many companies, more businesses are focusing on a newer family benefit known as elder care, servicing for older dependents.
A. Child care
B. With child care
C. Child care as
D. Being the Child care was
E. With child care’s being

这个题目我选C，觉得as要是少了的话完全不能有效表达句意，但前面的with省略好象也没什么道理，这样还能构成有效的独立主格结构吗？

12. Sulfur dioxide, a major contributor to acid rain, is an especially serious pollutant because it diminishes the respiratory system’s ability to deal with all other pollutants.  
A. an especially serious pollutant because it diminishes the respiratory system’s ability to deal
B. an especially serious pollutant because of diminishing the respiratory system’s capability of dealing
C. an especially serious pollutant because it diminishes the capability of the respiratory system in dealing
D. a specially serious pollutant because it diminishes the capability of the respiratory system to deal
E. a specially serious pollutant because of diminishing the respiratory system’s ability to deal

这个题目我实在很迷惑，感觉每个选项都是那么一回事，实在没法看出到底哪个更好些，请大家指点一下各选项的错误到底在哪，谢谢！