.At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
A. and not to speak B. but could not speak
C. instead of speaking D. or rather speak
.At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
A. and not to speak B. but could not speak
C. instead of speaking D. or rather speak
A
not speak与to stay at his own machine，keep his eyes on his screen是并列关系，形式应一致。故选A。