Public information is available to anyone who wants to know it.

available to   对…有效；对…可获得的;

If a store is open to the public,it means anyone can come in.

Question:A public company makes its shares available for purchase by any investor.

shares  股票    investor n.投资者; 投资机构;

Private information is not open to everyone, but is only available to trusted friends or family.

Information about one's secret hopes and dreams is usually private.

secret  adj.秘密的; 保密的; 

Question:Most people keep their personal information private.

Confidential information is secret information.

Confidential  adj.机密的; 保密的;     personal  adj.个人的; 私人的;

Confidential information is not supposed to be share with others.

Question:The details of a secret design or how a company makes decisions are often confidential.

Gossip is information that is ofen exchanged  because it's exciting or fun ,even though it's may not be true.

exchange v.交换; 交流;      exciting  adj.令人激动的;   ing是物，被动的

Gossip n.流言蜚语; 闲言碎语;   damaging adj.造成破坏的; 有害的; 损害的 

entertaining adj.有趣的; 娱乐的; 

Office gossip is often entertaining ,but it can also be damaging.

Question:People who gossip often enjoy embarrassing or hurting other people. 

               Gossip may hurt or embarrass the person being gossiped about.

Opinions are what people think or feel about something as supposed to factual information.

factual:adj.根据事实的; 事实的; 真实的;

Factual information is based on facts or evidences, but opinions are what people think or feel.

Question:Opinions ofen differ,and when they do people may argue.

Opinions ofen differ  众说纷纭     

Question: A company's secret are what kind of information?

                 What kind of information is often entertaining?

                Highly personal information is what kind of information?

                To make something public means it should be made available to everyone.

               Revealing confidential informtion ma be illegal.

         reveal   v.揭示; 显示; 透露; 显出; 露出; 展示;