题目

Well, my grandpa promised ________ a new computer for me next month. A . to buy B . buying C . bought D . buys 答案：A下列做法正确的是（　　）A．在做馒头时加入适量的纯碱，使馒头疏松多孔B．用工业酒精配白酒饮用C．用工业亚硝酸钠烹调食物D．用胆矾兑饮水杀菌