who the audience is."Frankly, I wouldn't use a happy face with any CEO in the US.I wouldn't use a happy face with the people of a certain level no matter how commonplace and acceptable it has become，" she said."You can make or break a relationship with one email these days."

语篇解读：本文是一篇说明文，向我们介绍了表情符号在工作邮件中的使用越来越流行的原因以及人们对此要注意的方面。

　　4．What does the author say about past working people?

　　A．They were calm and professional.

　　B．They used more serious emoticons.

　　C．They were not fond of emoticons.

　　D．They avoided using emoticons at the workplace.

　　解析：选D　细节理解题。根据第一段中的"they wanted to hold back their love for emoticons (表情符号) while on the job"可知，以前的职员在工作中抑制自己对表情符号的喜爱，即避免使用表情符号。故选D。

　　5．What can people use emoticons to do at the workplace?

　　A．Make it personal to communicate.

　　B．Keep up with the trend of the times.

　　C．Show a positive attitude to the receiver.

　　D．Help them share their ideas and feelings.

　　解析：选C　推理判断题。根据第四段的内容可知，当尴尬或者可能冒犯别人的事情发生时，或者可能误解了某事时，人们往往会使用表情符号来稍微改变一下语气，传达积极的交流氛围或者让表达变得缓和。也就是说，在工作场合，人们可以通过表情符号来向接收者表达自己积极的态度。故选C。

　　6．What can we learn from the last paragraph?

　　A．Emoticons should be used with caution.

　　B．There are strict limitations on emoticon using.

　　C．All the US CEOs are against the use of emoticons.

　　D．Emoticons can greatly help bring people closer.

　　解析：选A　推理判断题。根据最后一段中的"Pollak, however, warns against being too causal at work.""I wouldn't use a happy face with any CEO in the US.I wouldn't use a happy face with the people of a certain level""You can make or break a relationship with one email these days"可知，人们在使用表情符号时要谨慎，要分场合分人，不能随意使用表情符号。

7．What's the writer's attitude towards the use of emoticons at work?