They.in the river and had a good time.(swin)

问题描述:

They.in the river and had a good time.(swin)
这道题是用动词的适当形式填空,把.填满.

They (swam) in the river and had a good time.由于had是过去时,所以句中前后保持时态一致,就用swim的过去式swam