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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
5.0
________ 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
参考答案