For some time the expert __________ people of the health risks caused by passive smoking. He     says he won't stop until all the smokers around him decide to quit smoking.

----I wonder what makes you a successful manager.----I ______ as a waiter for five years, which contributes a lot to my today’s work.

Chinese athlete Liu xiang’s dropping out of the Olympic Games was really ______; it surely _____ the whole world.

He asked where she ____, but she didn’t respond.

 We ______very early so we packed the night before.