— Do you know anything about Chinese knots (中国结)?— Yes. They are usually regarded ______symbols of good luck.
China has the _____ population in the world.
—David has made great progress recently. —_____, and _____.
Now most families have only one child _____ our country’s one-child policy.
—Can you write the number eighty-five thousand, six hundred and twenty-six? —Yes, it is _____.
This is the most beautiful park I have _____ visited.