Once a programme put into a puter, it accordingly.
A. is; acts
B. is being; is acting
C. has been; will act
D. will be; acts
网友回答
A. is; acts
B. is being; is acting
(答案→)C. has been; will act
D. will be; acts
解析：因为时间状语从句或者条件状语从句中用一般现在时或现在完成时，主句用一般将来时。