THEY ……….. AT THIS SCHOOL BEFORE THEY BECAME INTERPRETERS.A. HAVE T...

6. - BO CAU HOI TRAC NGHIEM ANH 10
Lớp 10 BO CAU HOI TRAC NGHIEM ANH 10
6. They ……….. at this school before they became interpreters.a. have taught b. had taught c. taught d. were taught