题目

新中国成立以后，经过我国许多著名科学家的同心协力。1964年10月16日，我国终于成功爆炸了第一颗 A．氢弹          B．原子弹            C．导弹            D．地空导弹 答案：BNot until _________________ the better qualities in ourselves ____________ expect to find them in others.A. have we developed; can weB. we have developed; that can weC. we have developed; can weD. can we develop; that we will