--I'm trying to use the machine,but it __________ start.
--I'm trying to use the machine,but it __________ start.
---Let me show you how to start it.See,all you have to do is __________ the button.
A.can't;to press B.won't;press C.wouldn't;turning D.mustn't;to have pressed
How to choose,translate and why?Thanks.
B.won't;press