DO YOU KNOW THE MAN WORKING IN THE LABORATORY OVER THERE

70. - BAI TAP ON TAP KIEM TRA HOC KI 2
BAI TAP ON TAP KIEM TRA HOC KI 2
70. Do you know the man working in the laboratory over there?A. Do you know the man that working in the laboratory over there?B. Do you know the man who is working in the laboratory over there?C. Do you know the man works in the laboratory over there? D. Do you know the man whom working in the laboratory over there?