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The computer was invented in the 1940’s and quite a lot ever since.A.was changed

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The computer was invented in the 1940’s and quite a lot ever since.A.was changed

The computer was invented in the 1940’s and ______ quite a lot ever since.

A.was changedB.had changed
C.has been changedD.will change

试题答案

C

解析试题