I don't know the __ income of the family,but I do know it is

I don't know the __ income of the family,but I do know it is I don't know the ____ income of the family,but I do know it 初中英语题 I don't know the ———— of the family , but I do know it What do you think of the fish?It looks( ),but I don't know i 1.it is a ( )gold watch,but i don't know the ( )price of it. I don’t know where the key is,but I suppose I _______ it at I don't know why,but it is exactly the truth.It is never too I don't know __ to do next?It's easy.Press the red button in I don`t know who invented the telescope,but I think it is a The math problem is so difficult,I don't know __ A how to do -Do you know when he_ the work?-sorry,I don't know ,but I th I don’t know the man you mention,but of course I know ______