Computers will flourish because they enable us to accomplish tasks thatA.could never befor

外语类 专四 已帮助 人

Computers will flourish because they enable us to accomplish tasks that

A.could never before have been undertaken

B.would never before have undertaken

C.couldn"t be undertaken

D.mustn"t have been undertaken

请帮忙给出正确答案和分析,谢谢!

热搜:t确定权重的方法

答案解析

难度★★☆ 搜索
  • 正确答案:A
    此题只要正确理解了句子的意思,做出正确选择并不难。句意为:"计算机使人们得以干以前干不了的事,因此它将兴旺发达起来"。用couldneverbeforehavebeenun—dertaken暗含虚拟语气的意义。虽然B项也是虚拟形式,但语态不对。