PREP 求助！！！

sunfish223

60
Mideast immigrants' rates of entrepreneurship exceed virtually every other immigrant group in the increasingly diverse United States economy.
A Mideast immigrants' rates of entrepreneurship exceed
B Mideast immigrants are exhibiting rates of entrepreneurship exceeding
C Immigrants from the Mideast exhibit rates of entrepreneurship exceeding those of
D The rates of entrepreneurship in immigrants from the Mideast exceed
E The rates of Mideast immigrants' entrepreneurship exceeds those of

正确C  请问这句话的 main verb 是什么呀@@

57  
The Anasazi settlements at Chaco Canyon were built on a spectacular scale with more than 75 carefully engineered structures, of up to 600 rooms each,were connected by a complex regional system of roads.

A  with more than 75 carefully engineered structures, of up to 600 rooms each,were

B  with more than 75 carefully engineered structures, of up to 600 rooms each,

C of more than 75 carefully engineered structures of up to 600 rooms,each that had been

D  of more than 75 carefully engineered structures of up to 600 rooms and with each

E of more than 75 carefully engineered structures of up to 600 rooms each had been

正确答案B , 谁能帮我分析下 到底怎么回事呀，到底谁修饰谁？？？

谢谢大家啦 O(∩_∩)O~

fylonglong

第一个，助动词是exhibit/
第二个，of up to 600 rooms each是做插入语，each是指structures，后面的connected也是修饰structures的。