Mr green and Mr black are( both teacher) 对括号里提问写原因

Mr green and Mr black are( both teacher) 对括号里提问写原因
Mr green and Mr black are( both teacher) 对括号里提问
写原因

Mr green and Mr black are( both teacher) 对括号里提问写原因
What do Mr green and Mr black do?
both teacher ----都是老师 是他们的职业
所用用what do 提问.