有几道雨珐题，实在不明白，NN们请指教啊！！！！！

gggqqq

Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.  
A.    that a black hole lies at the center of the Milky Way and of
B.    that a black hole lies at the Milky Way’s center and
C.    that there is a black hole lying at the milky Way’s center and
D.    of a black hole lying at the Milky Way’s center and
E.    of a black hole that lies at the center of the Milky Way and of
答案：A  这句话是什么意思啊，再考什么知识点啊。。。
Although improved efficiency in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting consumption.  

A.    in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting
B.    in converting harvested trees into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost
C.    of converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, which boosts
D.    of harvested trees being converted into wood products may reduce harvest rates, it will stimulate demand, because it will increase supply and lower prices, thereby boosting
E.    when harvested trees are converted into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost
答案B
为什么A错了呢？boosting不是表示的是前面动作所造成的结果吗？B中的which为什么又没有发生指代不明的错误呢？
New items developed for automobiles in the 1997 model year included a safer air bag, which, unlike previous air bags, eliminated the possibility that a burst of smoke would appear when the bag inflated, and making an already terrified passenger think the car was on fire.  
A.    inflated, and making
B.    inflated, so that it could make
C.    inflated and made
D.    inflated and make
E.    inflated to make
答案D    完全不明白，请NN明示！！！！
Though the law will require emissions testing of all diesel vehicles, from tractor trailers to excursion buses, it will have no effect on sport utility vehicles, almost all of which are gasoline powered, and will not be subjected to emissions-control standards as stringent as they are for diesel-powered vehicles.  
A.    powered, and will not be subjected to emissions-control standards as stringent as they are for
B.    powered, and therefore not subjected to emissions-control standards that are as stringent as those of
C.    powered and therefore not subject to emissions-control standards as stringent as those for
D.    powered, which are not subject to emissions-control standards as stringent as they are for
E.    powered and therefore they are not subject to emissions-control standards as stringent as those of
答案C   为什么B不对呢？？？
At the turn of the twentieth century, forest covering as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, a third of them domesticated and performing various essential tasks.  
A.    covering as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, a third of them
B.    covering as much as 90 percent of Thailand accommodated as much as 300,000 elephants, and a third of them were
C.    covered as much as 90 percent of Thailand and accommodated as much as 300,000 elephants, with a third
D.    covered as much as 90 percent of Thailand and accommodated as many as 300,000 elephants, a third of them
E.    covered as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, with a third of them
答案D         我选的E  他们之间就是一个With的差别，有人能跟我说说这个with在这用法的一些技巧吗？？？

桃子酱

New items developed for automobiles in the 1997 model year included a safer air bag, which, unlike previous air bags, eliminated the possibility that a burst of smoke would appear when the bag inflated, and making an already terrified passenger think the car was on fire.  
A.    inflated, and making
B.    inflated, so that it could make
C.    inflated and made
D.    inflated and make
E.    inflated to make

would appear...and make....是这样的平行对称


你一下子放这么多眼睛都花了！

ansonlq

New items developed for automobiles in the 1997 model year included a safer air bag, which, unlike previous air bags, eliminated the possibility that a burst of smoke would appear when the bag inflated, and making an already terrified passenger think the car was on fire.  
A.    inflated, and making
B.    inflated, so that it could make
C.    inflated and made
D.    inflated and make
E.    inflated to make

would appear...and make....是这样的平行对称


你一下子放这么多眼睛都花了！

-- by 会员 桃子酱 (2010/10/26 21:20:38)

E，答案

Becky宝

Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.  
A.    that a black hole lies at the center of the Milky Way and of
B.    that a black hole lies at the Milky Way’s center and
C.    that there is a black hole lying at the milky Way’s center and
D.    of a black hole lying at the Milky Way’s center and
E.    of a black hole that lies at the center of the Milky Way and of
这道题首先考宾语从句（theory）后加that比加of要简洁 所以D E项先排除
C选项there be 结构啰嗦 所以排除
A B 选项重点看and 后面的of
如果选B 则many of the 100 billion other galaxies 与前面的宾语从句无法平行 句意也很无逻辑性 所以加上of使得
at the center of the Milky Way 与at the center of other galaxies一起成为center的修饰语 句意合理
不知道明白了没有