What do you think of being a volunteer ___________ the Youth Olympic Games—Well, I feel proud that I can work here ___________ a volunteer.

一Did you see___________ at the party一No, I didn’t.

ked in a car factory for four years, ______ he founded his own company in his hometown.

How do you usually find out about new software? — In the magazines like Popular Electronics. That’s _____computer companies usually advertise. [ ]

Expected noises are usually more _____ thanunexpected ones of the like magnitude