.It is that people will not agree with what the manager at the meeting.A. certainlyB. sur

问题补充：

.It is that people will not agree with what the manager at the meeting.

A. certainly

B. sure

C. certain

D. surely

答案：

A. certainly

B. sure

(答案→)C. certain

D. surely

解析：词义辨析。A. 副词，当然 B. 副词当然，形容词，确信的；可靠地 C . 形容词必然的；有把握的 D. 副词，当然，无疑。句意：在会议上人们必然不会与经理意见保持一致。结合语境可知选C。