She _______(add) that having conversations with friends was not h_英语解答

She _______(add) that having conversations with friends was not helpful at all.
这里要填什么,为什么
从语法角度试做分析

人气：489 ℃　时间：2019-11-05 04:12:43

解答

added
句中动词 was 是过去式,所以,主句动词也用过去式