Составить 5 типов вопросов по языку! ) (общий,специальный,альтернативный,разделительный,вопрос к подлежащему) вот к этому ! in the mid-1960s he began looking on thera for ancient settlements.

in  the mid-1960s he began looking on Thera for ancient settlements,didn’t he?  Did in the mid-1960s he begin looking on Thera for ancient settlements?  
Did he begin looking on Thera for ancient settlements in the mid-1960s or 1970s? Who began looking on thera for ancient settlements?
When did he begin looking on thera for ancient settlements? What did he begin looking for?