问04年8月，10月的几个语法

TinyChildUID: 2151650

1：a challenging new area in inorganic chemistry is ------the role of transition metals in the biochemical catalysts called enzymes.
为什么选‘that of understanding’而不选‘to have understanding’
2:The color and pageantry,keen rivalry ，and high level of competition (both )contribute to the great worldwide interests in the Olympic games.
其中both为什么错了，该如何改？
3：among the most complex cryslals are( that )of silicon dioxide,which has seven different structures at various temperatures and pressures, the most common being quartz.
其中that该如何改？
4：by 1810 the 23 towns of Hampshire county, Massachusetts,had reached a remarkable uniform of economic development (as well as)populatin density.
As well as 为什么错了？
5:(with more than )half the world”s annual yield of 50 million tons of soy beans,an important source of protein, is grown in the united states.
为什么with more than 错了？
6：. Because it is often dependent of the conditions (of )crystallization, the composition of the

minerals in a rock can be important in determining the rock's geologic history.
为什么of错了？

avexUID: 159089

全部都已讨论过了，见这几天的老语法帖

TinyChildUID: 2151650

给个链接行么？