I regret _____ that I am unable to help you.
______ her hard work, she succeeded in passing the exam.
Jenny pushed the door again to ______ it ______.
The teacher suggested _____ that we should make the most of time to study English well.
He said he would prefer ______ others rather than ______ by others.
Employees who have worked here for many years will be given ______ over newcomers.