We must know what we should do and what we should avoid _______ a good impression on others in publi

题目简介

We must know what we should do and what we should avoid _______ a good impression on others in public places.

A．to leave

B．leaving

C．to have left

D．leave

题型：单选题难度：中档来源：不详

试题分析：句意：在公共场合，为了给其他人留一个好的印象，我们必须知道我们该做什么，我们应该避免做什么。表示目的“为了……”，故用不定式，选A。