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__________ in the company for three years,Mark has become experienced in business negotiations.
A. Having worked
B. Have been worked
C. Have worked
D. Worked
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We are hapPY at the good news__________Mr.Black has been awarded the Best Manage.
A. that
B. which
C. what
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There is no evidence__________he was on the site of the murder.
A. where
B. which
C. that
D. how
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