China is a country with the largest population in the world, we all know it.
Professor Hawking stepped into the office I knew that there was no hope.
Usually children are allowed to ___________ when they are six years old.
.Our team was ahead during the first half, but we _____ in the last ten minutes.
It is the first time that I ___ this kind of moon cake.
While listening carefully, the students___ what their teacher said.