His wife gave birth to their first child. He under...

Câu hỏi: His wife gave birth to their first child. He understood what true responsibility meant.

A Never has he understood true responsibility before he became a parent himself.

B Were his first child not to be born, he wouldn’t understand true responsibility.

C Hardly had he understood true responsibility when their first child was born.

D Not until he became a parent did he understand what true responsibility meant.