请选择CBA3A+_6t6w7M*{'o0l'c8k3?I’ll have a class___ Monday..M-N-R9i*].s3e+f)y+m'k
A. on.M-N-R9i*].s3e+f)y+m'k
B. in.M-N-R9i*].s3e+f)y+m'k
C. under.M-N-R9i*].s3e+f)y+m'k