求问几道prep题

1、   Scientists at the LA has succeeded for the first time in mining heat from the Earth’s interior and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.

To produce energy on a commercial scale, enough for generating electricity efficiently and for heating (right answer)

To produce enough energy on a commercial scale for efficient generation of electricity and heat (my choice)

答案是让heat与generate并列，但是我选的是与produce并列，从逻辑意思上到底应该与哪个并列啊，还有enough的用法，我怎么觉得应该放在名词前面啊，而不是独立出来做状语啊。

2、   The Achaemenid empire of Persia reached the Indus Valley in the fifth century B.C., bringing the Aramaic script with it, from which was derived both northern and southern Indian alphabet.

With it the Aramaic script, from which derive both the northern and the (right answer)

With it the Aramaic script, and deriving from it both the northern and  (my choice)

It指代的是什么啊，from which 后面怎么没有主语啊，直接就是谓语derive阿，from which整个作句子的什么成分啊，northern与southern前的the都要有吗

3、
            In addition to her work on XX, M contributed to archaeology through her discovery of the earliest direct evidence of hominid activity and through her painstaking documentation of East African cave painting.

答案为A，

M’s contributions to archaeology include her discovering the earliest direct evidence of hominid activity and painstaking documentation of   (my choice)

我把in addition to 当作类似compared with之类的，里面的内容也要与主语一致，所以我就选了M’ contribution与her work对应。

3、   two years ago and again five years ago, there were extended periods when the D’s currency, the pundra, was weak: its value was unusually low relative to the world’s most stable currencies. Both times a weak pundra made D’s manufactured products a bargain on world market, and D’s exports ware up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the punra to become weak again.  Weaken

After several decades of operating well below peak capacity, D’s manufactured sector is now operating at near-peak level. (right answer)

The economy of a country experiencing a rise in exports will become healthier only if the country’s currency is strong or the rise in exports is significant.  (my choice)

 有没有人帮忙回答下阿，谢谢

1.应该heat与generate并列,同为produce energy on a commercial scale的用途

形容词短语可做伴随状语

2.是倒装 主语是 both the northern and the southern Indian alphabet.谓语derive   from   宾语which

it指代the Indus Valley

the 要加表示一类

3.in addition to 引导副词短语做状语.不构成比较