5(5.0分) 5.0 ________ in the company for three years, Mark has become experienced in business negotiations. A) Having worked B) Have been working C) Have worked D) Worked

5(5.0分)

5.0
________ in the company for three years, Mark has become experienced in business negotiations.
A)
Having worked
B)
Have been working
C)
Have worked
D)
Worked

出自：华北水利水电大学-工程测量技术-大学英语（2）

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