问题补充：
单选题
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 speakB.but could not speakC.instead of speakingD.or rather speak
网友答案：
热心网友 1楼
A解析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。
