Betty has lived in Beijing (for six years).（对括号提问） _____ ____ _____ Betty lived in Beijing?
Betty has lived in Beijing (for six years).（对括号提问）
_____ ____ _____ Betty lived in Beijing?
His parents lived in Beijing (ten years ago).（对括号提问）
____ ____ his parents ____ in Beijing?
I have studied English for three years.（改同义句）
I have studied English _____ three years _____.