The students always have ______ to do.
China is a _____country, while Japan is a ______country.
—Would you like to have _____? —No, thank you. I’ve had enough.
—Is the schoolbag beautiful? —Yes, at _____ it’s _____ the one you bought for me.
—What do you think of Project Hope? —Great! It has made important contributions _____the education.
The traffic in the city _____ be terrible, but now it has improved a lot. I think you will ____ it soon.