A：世界上使用人数最多的语言
B：联合国规定的唯一工作语言
C：世界上使用最广泛的语言
D：上海世博会唯一指定外语
当前亚洲存在的主要人口问题是 ( )
It was ______ ten o'clock when I heard a loud noise.
--- Did you at the party, Owen?
--- Yes, I was very happy.
