I don't konw whether/if i should believe

I don't konw whether/if i should believe I don't konw I don't konw I don‘t konw I don't konw . I don't konw .中文中文翻译 I don't konw.的意思 i don' t konw a ( ) about him I don't konw()and()mother.(he) I don`t think I konw和I think I don`t konw 这两句有啥区别 whether 后面加了 or not 后,有什么不同?加NOT 有什么作用呀?I don't konw whether he has a dog (or not). i don't konw what i can do here.i don't konw what i can do here.（改为同义句）i don't konw ()()()here. I don't konw what i can do here. i don't konw where i should go. Shirley( )a book about China last year but I don't konw whether she has fininshed it.A.has written B.wrote C.had written D.was writing I don't konw I should do的同义句I don't konw ＿＿　两空 I don’t konw what i should say 改同义句I don't konw _____ _____ _____ i don't think i konw和 i think i don't know哪个对