健康问题迫使他戒烟。

Health issues ___compel him to quit smoking.

正义感促使他站出来为受害者作证。

His sense of justice ___compelled him to testify for the victim.

强烈的责任感促使他加班完成了这个项目。

A strong sense of duty ___compelled him to work overtime to finish the project.