When he came back, his _________ look on his face, he failed in the interview.
A:disappointed
B:disappointing
C:encouraged
D:encouraging
男女同学之间交往不恰当的方式有( )
当我国最东端的乌苏里江7点太阳升起,我国最西端帕米尔高原上的边防战士可能在( )