She （ ） into the thick forest alone on such a dark night.
（A）dares not go
（B）dares not to go
（C）dare not to go
（D）doesn't dare to go
He began to write two hours ago. He （ ） have finished the article now.
（A）must
（B）ought
（C）ought to
（D）had to
I have something important to tell John. But I can't find him. — His cell phone is here, so he （ ） have gone too far.
（A）mustn't
（B）needn't
（C）wouldn't
（D）can't
