[問題]GWD 6-41

[peavey]

The greatest road system built in the Americas prior to the arrival of Christopher Columbus was the Incan highway, which, over 2,500 miles long and extending from northern Ecuador through Peru to Southern Chile.

A. Columbus was the Incan highway, which, over 2,500 miles long and extending

B. Columbus was the Incan highway, over 2,500 miles in length, and extended
C. Columbus, the Incan highway, which was over 2,500 miles in length and extended

D. Columbus, the Incan highway, being over 2,500 miles in length, was extended

E. Columbus, the Incan highway was over 2,500 miles long, extending

答案是E，那請問整句的主要動詞在哪裡?

[Belief]

動詞就是urged

這個很難看出來??

[林小馬]

http://www.formosamba.com/phpBB3/viewtopic.php?t=399
請接續原討論串 謝謝喔