GWD第16套中的SC 牛人赶紧帮我看看 为什么啊

zlljolie

以下加粗的是正确答案
4. GWD25-Q4.

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选择A 这个最后的of怎么理解？不懂啊

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

20. GWD25-Q20

Most states impose limitations on the authority of the legislature to borrow money, with their objectives being to protect taxpayers and the credit of the state government.

A.to borrow money, with their objectives being to protect

B.to borrow money, the objectives of which are the protecting of

C.to borrow money, limitations intended to protect

D.for borrowing money, of which the objective is protecting

E.for borrowing money, limitations with the intent of protecting

这题C哪里错了？B怎么看起来也不是很简洁啊……

24. GWD25-Q24

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 harvestrates, it will stimulate demand by increasing supply and lowering prices, thereby boosting

B.in converting harvested trees into wood products may reduce harvestrates, demand will be stimulated because of increasing supply andlowering prices, which boost

A选项为什么错？

31. GWD25-Q31

New items developed for automobiles in the 1997 model year includeda safer air bag, which, unlike previous air bags, eliminated the possibilitythat a burst of smoke would appear when the bag inflated, and making analready 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 为什么？看不懂啊

E.inflated to make

sdcar2010

the possibilitythat a burst of smoke would appear when the bag inflated and make analready terrified passenger think the car was on fire.

Simple version:
the possibility that a burst of smoke would appear...and make ...

apear and make are two parallel verbs for the same object.

sdcar2010

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.


You cannot tell what does "it" refer to in this sentence, can you?

zlljolie

it 不能指代the poor efficenciy吗（从句的主语）？