—May we start the meeting now?

—No, we ______. We ______ to start until the manager comes.[ ]

A. mustn't; are allowed

B. don't have to; are supposed

C. needn't; aren't allowed

D. can't; aren't supposed

黄埔军校和以往军校的主要不同之处在于

①聘请外国教官，采用西式练兵方法②以培养陆军军官为主，兼及海军军官③把政治教育和军事训练放在同等重要的位置④注重培养学生的爱国思想和革命精神[ ]

A．①②

B．③④

C．①③

D．②④