—What were you doing at 8:00 last Sunday?
—I ______ rubbish with my classmates by Zijiang River.
A.picked up
B.am picking up
C.was picking up
—What were you doing at 8:00 last Sunday?
—I ______ rubbish with my classmates by Zijiang River.
A.picked up
B.am picking up
C.was picking up