Tom, clean up the broken glass _________ someone walks on it.
Professor Smith,along with his assistants,___________ on the project day and night to meet the deadline.
_______you’ve got a chance, you might as well make full use of it.
The way ______he looks at problems is wrong.
In our factory there are 2,000 workers, two thirds of ____are women.
He talked a lot about things and persons ________they remembered in the school.