请选择CBA5O6q.Z,|5C2K:I—What did you do yesterday?-v6w9Z7a-v)}
—I________ on the train.-v6w9Z7a-v)}
A. jumping-v6w9Z7a-v)}
B. jump-v6w9Z7a-v)}
C. jumped-v6w9Z7a-v)}