77. Mr. Dawson /work / surgeon/hospital / over / 20 years.
A. Mr. Dawson works as a surgeon in this hospital for over 20 years.
B. Mr. Dawson has been working as a surgeon in this hospital for over 20 years.
C. It's Mr. Dawson who works as a surgeon in this hospital for over 20 years..
D. Mr. Dawson, who has worked as a surgeon in this hospital for over 20 years.
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