---I heard your grandpa used to be a teacher. --- Yes. He was a Chinese teacher ______.
A.on the 1950s | B.in the 1950s |
C.at the 1950’s | D.in 1950’s |
---I heard your grandpa used to be a teacher. --- Yes. He was a Chinese teacher ______.
A.on the 1950s | B.in the 1950s |
C.at the 1950’s | D.in 1950’s |