Darkness and ashes came again, a great weight of them. We stood up and shook the ash off again and again; otherwise we would have been covered with it and crushed by the weight.At last the cloud became thinner and thinner until it was no more than smoke or fog. Soon there was real daylight. The sight that met our still terrified eyes was a changed world, buried in ash like snow.
―from Pliny's letter to a friend
文章大意：文章是Pliny写给朋友的信，介绍地震后地动山摇，天昏地暗的情景，和人们惊慌失措的样子。
1．Pliny left the town after ________.
A．the eruption
B．the sky became dark
C．the buildings began shaking
D．the sea went back
答案：C 细节理解题。从文章第一段的句子：All around us buildings shook. We decided to leave the town.可知Pliny离开城镇是在房屋开始摇晃以后，选C。
