i___at that time but later changed my mind(agree)

问题描述:

i___at that time but later changed my mind(agree)
适当形式填空

I (agreed) at that time but later changed my mind.
那时候我同意了,但后来我又改主意了.
这一空填过去式.答案唯一吗?disagreed 可以吗这个句子的意思并不很明确,填disagreed也说得通。