The flu is believed___by viruses that.causing being caused to have caused to be caused选哪个顺便解释下

分类: 作业答案 • 2022-06-24 13:43:14

问题描述：

The flu is believed___by viruses that.
causing being caused to have caused to be caused
选哪个顺便解释下

答

to be caused
be believed to 表示被认为是...
由于flu和virus之间是被动关系,所以上一句要用被动语态
正句话翻译过来就是流感被认为是由病毒引起的..