请选择ABC'B-H.W4H0j0G,m+y3Z7~3p5c*u2W,y The students are talking about their weekends _____ Friday afternoon.7j.`(\8`5Q*O)q)D
A on7j.`(\8`5Q*O)q)D
B in7j.`(\8`5Q*O)q)D
C at7j.`(\8`5Q*O)q)D