请选择ABC/H2K*L,p6w4J6z8E-D—What did you do yesterday?6}'s6b0X8}8z
—I________ on the train.6}'s6b0X8}8z
A. jumping6}'s6b0X8}8z
B. jump6}'s6b0X8}8z
C. jumped6}'s6b0X8}8z