在第二次世界大战中同盟国召开了一系列会议，其中决定成立联合国的会议是[ ]

A、开罗会议

B、巴黎和会

C、雅尔塔会议

D、波茨坦会议

. The happy look on his face suggested that he ________the final examination successfully.

A．passes

B．had passed

C．would pass

D．should pass