Misunderstandings _____ from lack of social communication, unless _____ with properly, may lead to serious problems.

 _____ as the most excellent student in her university, as most classmates had expected, made her parents very happy.

We spent hours driving and another few hours waiting, only _________ that the plane would be delayed until midnight.

             all his courage, he invited the lady to get off the train with him.

Jack was in low spirits those days and his friends did all they could _____ him up.