The Chisos Mountains in Big Bend National Park in Texas were created by volcanic eruption that occur

题目

The Chisos Mountains in Big Bend National Park in Texas were created by volcanic eruption that occurred____.
a)the area in which dinosaurs roamed b)when dinosaurs roamed the area
c)did dinosaurs roam the area d)dinosaurs roaming the area

答案

选 B 德克萨斯州的 大弯曲国家公园 里的 Chisos Mountains 是恐龙在这个地区出没的时代由火山喷发造成的.