Tom, clean up the broken glass _________ someone walks on it.
With economy developing at great speed, our city has _____ quite a few changes in recent years.
Currently,many American women are still faced with the _____ of choosing between work and family commitments.
— Thanks for the lift. I do appreciate it. — _____.
It was at the school _____ was named after a hero________ he spent his childhood.
On December 26, 2004, a terrible tsunami happened in the Southeast Asia, _________ many people.