题目

检验某岩石是否是石灰石最好的方法是                                 （      ） A、向岩石上滴盐酸   B、高温煅烧   C、向岩石上滴蒸馏水   D、以上方法均可 答案：A---______ I play computer games for a while?---I'm sorry, because you ______ play it by, yourself.A.Can, mayn'tB.May, can'tC.Can, can'tD.May, mayn't