题目内容：
________ 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
参考答案：
选择题：________ in the company for three years, Mark has
- 题目分类：华北水利水电大学-水利水电建筑工程-大学英语2
- 题目类型：选择题
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A)
Having worked
B)
Have been working
C)
Have worked
D)
Worked