今天遇到这个语法题

kkllabao · 发表于 2005-7-12 18:38:00

A challenging new area in inorganic chemistry is ------- the role of transition metals in the biochemical catalysts called enzymes.

a. that of understanding b. to have understanding

c. the understanding d. understanding that

答案选A.....不明白呀。that 做什么成分，感觉答案要是understanding 就好了

Dennies · 发表于 2005-7-12 19:08:00

are you sure about this anser? i choose D

kkllabao · 发表于 2005-7-12 19:15:00

sorry, i am not sure. just get some reference from CD

forgmat66 · 发表于 2005-7-12 21:16:00

A。答案d是不对的，因为that后并没有一个完整句子。

kkllabao · 发表于 2005-7-12 22:10:00

楼上大虾，讲解一下吧，谢谢了！

所属分类: TOEFL / IELTS