求教新Prep2的题， Prep2 175, Prep2 193 ,with的用法谢谢！

175.
   (30931-!-item-!-188;#058&005850)     (GWD-9-Q3)

Because of wireless service costs plummeting in the last year, and as mobile phones are increasingly common, many people now using their mobile phones to make calls across a wide region at night and on weekends, when numerous wireless companies provide unlimited airtime for a relatively small monthly fee.

A. Because of wireless service costs plummeting in the last year, and as mobile phones are increasingly common, many people

B. As the cost of wireless service plummeted in the last year and as mobile phones became increasingly common, many people

C. In the last year, with the cost of wireless service plummeting, and mobile phones have become increasingly common, there are many people

D. With the cost of wireless service plummeting in the last year and mobile phones becoming increasingly common, many people are

E. While the cost of wireless service has plummeted in the last year and mobile phones are increasingly common, many people are

OA: D

本来一直以为with 后面是不能跟doing形式的，究竟有这种说法吗？

193.
            (29942-!-item-!-188;#058&004596)     (T-3-Q2)

As the honeybee’s stinger is heavily barbed, staying where it is inserted, this results in the act of stinging causing the bee to sustain a fatal injury.

A. As the honeybee’s stinger is heavily barbed, staying where it is inserted, this results in the act of stinging causing

B. As the heavily barbed stinger of the honeybee stays where it is inserted, with the result that the act of stinging causes

C. The honeybee’s stinger, heavily barbed and staying where it is inserted, results in the fact that the act of stinging causes

D. The heavily barbed stinger of the honeybee stays where it is inserted, and results in the act of stinging causing

E. The honeybee’s stinger is heavily barbed and stays where it is inserted, with the result that the act of stinging causes

OA: E

C的话其实 results in修饰stinger不太好，因为最重要的原因是heavily barbed and staying where it is inserted, 才导致了后面的原因。

两道题with 用法都和本来的观念有点出入，有没有NN能帮忙解释一下？

独立主格（带主语的无动词分句）有三种形式：

       1、n. + 名词短语/分词短语/介词短语/形容词短语/副词短语

       2、with + n. + 分词短语/介词短语/形容词短语，这种形式与主句有相对紧密的联系

       3、复数名词，each+分词短语/介词短语/形容词短语，强调型独立主格