______ when the earthquake ______ last week? A. What did you do / would start B. What had you done / has started C. What have you done / starts D. What were you doing / started3/100______ when the earthquake ______ last week? What did you do / would startWhat had you done / has started What have you done / startsWhat were you doing / startedGiải thíchChọn đáp án D