Jawabanmu

2014-08-05T20:22:13+07:00
T to s = attention please!
s to t = excuse me sir/miss, .....
s to s = friends, i want to say something,  ....
2014-08-05T23:54:05+07:00
Teacher to student: student, attention please!
student to teacher: excuse me sir/miss
student to student: hi guys......