Computers have _____ many changes in the workplace.

A. heard about
B. known about
C. brought about
D. cared about
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科目：高中英語 來源：0127 模擬題 題型：單選題

Computers have _____ many changes in the workplace.
[     ]
A. heard about
B. known about
C. brought about
D. cared about

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