It is not polite to ________ when someone is making a speech at a meeting like this.

It is not _____to quarrel with your boss.

To keep a conversation flowing smoothly, it is better for the participants______.A．not to

It is essential to follow a firm and______political line.A．continualB．constantC．consistent

_____ is of no concern to me. A. It rains or not B. Whether it rains or not

It is not enough only to __________ the rules of grammarif you want to learn English

To keep a conversation flowing smoothly it is better for the participants ______.A.not to