1998#1999

１allotropes are the individual form of an element that....

whats wrong with form,should we change it to forms？

２many of central and western Nebraska is like the dry.

many is wrong,why,and why we use ”is “here？

３all early art,-----rock painting or the carved stool of a cheif,served a ritual or magical purpose.

Bof which a

Cincluded the

Dwhether a

key:d, of which a also fit here ,i think.in addition,whether a sounds a little strange.

hope u can help me to solve these.'. (:

1form here can never appear ,because  : A singular count noun with no determiner is WRONG, WRONG, WRONG.

2is describe: Nebraska

many of,,,should +are

3of which should + a whol sentence,只是插入语而已。

hope my explaination are right>>>

2、many改成most，可能就比较容易理解了。。呵呵

请关注语法大全或语法笔记。建议还需要多练习总结。