About how many elements _____ make up most of the substances we meet in everyday life
Maria has written two novels, both of ______ have been made into television series.
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.