We apologize for any inconvenience you _______ have been caused by the delay of the flight.
She devoted herself ______ to her research and it earned her a good reputation in her field.
Don’t leave the water ______ while you brush your teeth.
Listening to loud music at rock concerts ______caused hearing loss in some teenagers.
People from the West like to use such expressions as “please” and “thank you” in cases ______ some people in Asia may not think it necessary.
______ has passed the test will get a prize.