I would take a guess at( )I thought was the coI would take a gues_英语解答

I would take a guess at( )I thought was the co
I would take a guess at( )I thought was the correct answer.括号里是该填what还是that?

人气：192 ℃　时间：2020-04-07 10:38:38

解答

what
本句明显at后没介词宾语,后面的从句也没宾语,故填what作双重成分.