756. To map Earth's interior, geologists use a network of seismometers to
chart seismic waves that originate in the earth's crust and ricochet around
its interior, most rapidly traveling through cold. dense regions and slower
through hotter rocks.
A. interior, most rapidly traveling through cold. dense regions and slower
B. interior, which travel most rapidly through cold, dense regions, and more
slowly
C. interior, traveling most rapidly through cold, dense regions and more
slowly
D. interior and most rapidly travel through cold, dense regions, and slower
E. interior and that travel most rapidly through cold, dense regions and
slower
Answer: C

推 讲解清楚另外想请教D大一个问题: 在实战中看到 , + Ving 是不是一定要确认是主词才可呢？感谢 D大解惑 了解了