— Our teacher wants us to be ______ when we talk with the foreigners.— Yes, we should believe in ourselves.

That boy is not          to go to school． He is only three years old．

Yang Shanzhou becomes well-known in China for planting so many trees for people.

—You see, “Food Safety” receives thousands of Internet hits a day.—Obviously, it has become one of the _________ topics recently.

She is wearing blue today．Maybe she feels________nervous and stressed．