单项选择题:Yesterday I saw them ___in the river.A.swam B.swim C.to swim D.be swimming
问题描述:
单项选择题:Yesterday I saw them ___in the river.
A.swam B.swim C.to swim D.be swimming
答
单项选择题:Yesterday I saw them ___in the river.
A.swam B.swim C.to swim D.be swimming