[求助]97-05-14 97-08-12 97-05-26 97-05-37 请给一下祥解!!!

8.Written to be perfprmed on a -----,Throno Wilder's play our town depicts life in a small New England community.

A. stage scenery of bare           B  bare of stage scenery          C . scenery bare of stage

D stage bare of scenery

这答案的几个词是什么词性呀?

12.Outside the bright primary rainbow,------much fainter secondary rainbow maybe visible.

A so     B a    C   since   D  still 这里4个选项是什么词性呀?

21. Research in the United States on acupunture has focused on it use in pain relief and anesthesia.这里的A是名词吧?

RELIEF是做什么词性?

25. One of the problems of U.S agriculture that has persisted during the 1920's until the present day is the tendency of farm income to lag behind the costs of production

请问这里的A 能这样用吗? 有了THE 怎么还可以加S呢?

31. The WB were owner of a bicycle shop, and they used a number of bicycle parts to make the original motorized airplane.请问这里的这2个词是什么词性?