题目

.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 答案：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。