Not knowing whether he's dead or alive is a terrible feeling

Not knowing whether he's dead or alive is a terrible feeling The worst feeling is not knowing whether to give up or wait是 Not Dead or Not Alive the worst feeling ever is not knowing whether you should..这里 The worst feeling ever is not knowing whether you should wai Knowing office rules— whether _______ or not—is critical,esp dead or alive是什么意思 He made a decision whether the weather is good or not,he wil alive not dead是什么 alive not dead whether a person is happy or not partially depends on how he whether he is right 之后要加 "or not"吗?