原句是：(假設(shè))買了汽車支付...
The nobleman sold his car to repay Farmer Fleming.
英語不像中文,如果用英語寫疑問句必須使用一個(gè)助動(dòng)詞（原句里有助動(dòng)詞或者情態(tài)動(dòng)詞時(shí)除外）.
已有助動(dòng)詞：
--He will go there alone.
疑問：Will he go there alone?
已有情態(tài)動(dòng)詞：
--He should go there.
疑問：Should he go there?
你給的句子沒有助動(dòng)也沒有情態(tài)動(dòng)詞,就要在疑問句里加上一個(gè)助動(dòng)詞.又由于原句使用了過去時(shí),所以要用did.這個(gè)助動(dòng)詞did要放在主語前面.What did the nobleman do...