Tom, clean up the broken glass _________ someone walks on it.
It is true he said surprised us all.
It’s said that Singapore is really a beautiful country. I’m considering _______ it.
Mary three of her classmates invited to the party.
When I woke up, I found myself ______ in bed and ______ by doctors and nurses.
— What does the sign over there say?— No person ______ enter the area without the official permission.