HE ... TEACHING IN THIS SECONDARY SCHOOL ... TEN YEARS.A) WAS/ABOU...
47. He ... teaching in this secondary school ... ten years.
A) was/about
B) had been/about
C) has been/about
D) has been/for
47. He ... teaching in this secondary school ... ten years.
A) was/about
B) had been/about
C) has been/about
D) has been/for