How does Dickens demonstrate that
Oliver has a mysterious background?​

Which verb from is used to indicate the perfect progressive tense

Which evidence supports the inference that nora is afraid of what torvald will say if krogstad tells him about her forgery? do it for my sake—for your own sake—for the children's sake." "you don't know what that letter can bring upon us." "yes, it's too late." "you will never have to do that."

Identify how chekhov’s background and beliefs may have influenced his short story “the bet”.