You have to wear special clothing, a helmet and a life jacket ____ your raft gets turned upside down or sinks.
Much ________ my surprise, every student looked at me _________surprise when I came into the classroom
It was the third time that the boy _________ late. So his teacher got very angry.
The two military exercises were similar __________ they were both intended to give a threat to a certain country.
_________ everyone can hear the speaker, there is no _________ in turning up the radio.
Many friends sent me e-mails to _________ me on the birth of my son.