20. His parents were teachers in that school, _______ lost their lives in order to save
their students in the earthquake.
A. none of them B. both of them C. none of whom D. both of whom
20. His parents were teachers in that school, _______ lost their lives in order to save
their students in the earthquake.
A. none of them B. both of them C. none of whom D. both of whom
D