问题描述：
( )6.Acomputer does only what thinking people _______. A. have it to B. nave it d
( )6.Acomputer does only what thinking people _______.
A. have it to B. nave it done C. have done it
D. having it done
( )6.Acomputer does only what thinking people _______.
A. have it to B. nave it done C. have done it
D. having it done
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