40.Most have worked their way up from sales representatives，and they are very proud of the role they played in the company's growth.

四級詞匯講解:

work one's way up是口語中經常用到的搭配，意為“(從底層)往上爬”，是非常形象的表達。be proud of意為“為……而驕傲、自豪”。they played in the company's growth作role的定語從句，其中短語play a role in意為“在…中發揮作用”。

英語四級考點歸納：

短語work up在口語中經常出現，還可細化為如下搭配:

※ work sth. up意為“逐步發展;努力改進”。如:
I can't work up any appetite.我怎么也無法增加食欲。

※ work sb./oneself up(into)意為“使激動;使發怒”。如:
What are they so worked up about?他們為了什么那么激動啊?

※ work sth. up into sth.意為“使完好，修整”。如:
You should work your notes up into an esay.你應該把你的筆記整理成論文。