HOW OLD WAS HE WHEN HE RETIRED

39. - DE THI HOC KI 2 ANH 10 DE THI HOC KI 2 SAMPLE TEST ENGLISH 10
DE THI HOC KI 2 ANH 10 DE THI HOC KI 2 SAMPLE TEST ENGLISH 10

39. How old was he when he retired?

A. 37 B. 36 C. 39 D. 40