Look ! Mr Wang ______his students
—It's difficult to get to the other side of the river.—I think a bridge ________ over the river.
—How often do I need to feed the dog?—It ________ food every day, or it will be hungry.
_____ the morning of December 1st, 2006, the 15th Asia Games _____ in Doha(多哈).
Her life ________ a lot during the last three years.
Chinese ___by more and more people in the world now.