请选择CBA)s3v*n,H)~'y We played ping-pong ________ Thursday.2M1}2\;?3X*x,g9N
A、in2M1}2\;?3X*x,g9N
B、on2M1}2\;?3X*x,g9N
C、at2M1}2\;?3X*x,g9N