Jack could not answer, because she had not told him to.

Jack answered her questions and asked more of his own.

However, Jack had been called to an 'interview' at the University and did not answer his phone.

Jack did not answer at once: he was watching for the fall, counting the seconds.

Jack didn't answer right away, but there was never any doubt what his answer would be.

Jack hadn't been answering all afternoon, but this time it was Rosa.

Thanks for your support/ Jack answered with an edge on his voice.

Jack understands everything he says, however, but always answers him in English.

Jack didn't answer, but he couldn't help the look on his face.

Jack might have answered that the line was set aside for the Russian's direct access, but didn't.