英语翻译I am still at a loss whether to believe it & what to do

英语翻译I am still at a loss whether to believe it & what to do I am at a loss what to do 中what to do 做什么成分 at a loss what to do She is at a loss whether going out with I was still at a loss what to say I am qnite at a loss what to While I was at a loss what to do, at a loss for what to do ,at a loss what to do都可以吗? I'm at a loss as to what to do and feel lost I’m completely at a loss the know what to do next,what shoul who can it be i am quite at a loss to guess. ,but I am at a loss which to buy 1.I was at a loss,___ (puzzle) about what to do next.