He promised to make a phone call to me _______.
The number of people invited ____ fifty, but a number of them ___ absent for different reason.
In order to get good marks, he has changed his attitude ______ study.
There is no ____ that 100 years ago animal testing was cruel, but today animals in experiments are very well taken care of.
He was about to make a call to Tom _____ Tom patted me on the shoulder.
She wondered uneasily what use she would _____ this opportunity.