we plant trees in Mar.12th改错
问题描述：
we plant trees in Mar.12th
改错
答
小学的吧？需要过去时的话是we planted trees on Mar.12th具体每天是用on
如果不要求过去式，那么写we plant trees on Mar.12th就行了，很简单
答
we planted trees on march 12.
答
We planted trees on Mar.12th
答
we planted trees on Mar.12th
或者
we will plant trees on Mar.12th