There________a great earthquake in this area, for a lot of buildings-考呗网题库移动版

单选题 There________a great earthquake in this area, for a lot of buildings were half buried in the earth．

A．must have been
B．will be
C．were
D．has been

参考答案A

解析: A。这个地区一定发生过大地震，因为好多房屋都半埋在土里。
考查情态动词表示推测的用法。由本句中for引导的原因状语从句(时态为一般过去时)可以判定，主句是表示对过去事情的肯定推测，需用“must have+过去分词”的结构，故本题选A。

单选题 If the ocean were free of ice, storm paths would move further north,________the plains of North America of rainfall．

A．to deprive
B．deprived
C．depriving
D．deprive

单选题 So confused that he didn't know how to start his lecture．

A．since he became
B．would he become
C．that he became
D．did he become

单选题 In reading stories we anticipate what is to come________on our memory of what has gone before．

A．based
B．basing
C．to base
D．to be based