Despite other scientists' __________ of interest, Fleming kept trying to develop the chemical __________ it would be safe and effective.
I found that the homework was not _______ as what I used to get in my old school.
Is this the factory______ he worked ten years ago?
______ entering the room, she opened her bag to review lessons.
This is the reason ______he explained at the meeting for his carelessness in his work.
______ is a waste of time spending many hours ______ computer games every day.