Since Shanghai won the right to host the World Expo, over half a million people have volunteered to ___________in all the Shanghai Expo projects .
— But for your timely warning, we _____ into great trouble. — Well, you know we're friends.
Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe _____.
Hard work and lack of sleep have _____ her beauty and youth in recent years.
— Do you have any problems when you _____ this job? — Well, I'm considering the salary and working conditions.
This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.