问几道 SAT 的语法题

问几道 SAT 的语法题
1 错误：The average adult American in the 1970s read more novels than did the 1980s and 1990s.
正确：The average adult American in the 1970s read more novels than did the average adult in the 1980s and 1990s.
为什么the average adult不能省略呢?在比较句结构中什么时候可以省略?
2.错误：Americans,consuming massive quantities for decades,are recently beginning to limit their intake of sugar.
答案说它没有交代清楚什么被consumed 了,为什么就不能理解为consumed 了sugar?
3.错误：Albert Einsein made a bold leap while he adopted as his fundamental premise a paradox that had been ignored by other physicists.
为什么关联词while用错了?
4.错误：It may be that the conflicts between parents and their children are indications of the children's need for dependence as against their desire for indenpendence.
这句话哪里错?要怎么改?
5.错误：Gloria Feldon is almost equally talented whether a singer or a song writer.
正确：Gloria Feldon is almost as talented a singer as she is a songwriter.
错句为什么错.正确句中我觉得那个she is 有点怪啊.
6.The giant seaplane has 100-yard long wings that provide its stability and carry its eitht massive engines.这句话的用provide its stability 有没有错?
7.错误：The reason the event was cancelled was not so much the poor weather than the lack of interest.
正确：The reason the event was cancelled was not so much the poor weather as the lack of interest.
难道so...as 是固定搭配?
8.错误：Although he was not elected as the captain,Omar is the team leader for being the most vocal and respected player on the team.
这句话哪里错?
9.正确：Having lived there as a child,Judy found the street to be vaguely familiar.
为什么要用 to be
10.The delicious and vast menu choices contribute to the popularity of the Etiopian restaurant as greatly as the authentic and quaint decor,
这句话有没有错?
这些都是Princeton 里面的题.答的好的有加分.