新东方语法教程练习7

ncraig

7-8:Naturally occurring abrasive substaces include various forms of silica, pumice, and emery.

请问这里的occurring 与abrasive 可否互换，意思是否仍旧一样？

7-9:......in the upper part of their long, thin legs allow deer to run swiftly and jump far.

A:Muscles are powerful

B:There are powerful muscles

C:The powerful muscles that

Dowerful muscles

B选项前面有了there are之后就为什么不可以选了？there are在句子里起一个怎么样的作用？

7-11into) a surface (to) create a decorative design.

这里的into......to......是否为固定搭配？

7-14:At the South Pole......,the coldest and most desolate region on Earth.

A:Antarctica lies where

B:where Antarctica lies

C:Antarctica lies and

D:lies Antarctica

不明白A长得那么像错的为什么还对了（特别是看到there放最后。。。。。。）

7-22:also 和and 在用法上有什么区别？

7-30.Charlotte Perkins Gliman is known (prmarily) as an author (of short) stories, but she also wrote an inflential (book argued) for (equal) economic opportunities for women.

C怎么改呢？

7-39:It has been reported that (during) any twenty-four (hour) period, (a minimal of) three hundred North American women (start) their own business.

是否把C的minimal改成minimum，此外D的start是否要改成started?