The life people were used to _____ since the earthequake happened in Wenchuan.A changed B.changing C.has changed D.having changed请告知理由谢谢

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The life people were used to _____ since the earthequake happened in Wenchuan.
A changed B.changing C.has changed D.having changed请告知理由谢谢

选C.
句子中有个定语从句.The life是先行词.(that)people were used to是定语从句.这个定语从句省略了关系代词that.
关系代词that充当be used to的宾语.
自从汶川发生地震以来,人们过去所习惯的生活(方式)已经发生了改变.

这个题目选D
因为是since 是现在完成时的标志
第二,be used to (习惯)的to 是介词,后面必须跟动名词,因此用having changed
汶川地震以来,当地人民已经适应了这种变化

选C,完成时

C
people were used to 是life的定语 意为人们过去习惯的生活 可以把people were used to拿掉看
主句就是 the life __________ since the earthequake happened in Wenchuan.
缺少谓语动词。而后面是since要用完成时态,所以选C