Sally and I are in ______.

I’m going to stay in my uncle’s for       .

There are nine______ students at Green High School. Five _____ of them walk to school.

Mary came ______in the Chinese exam. This is _______time she got the good mark.

Six million, six hundred and sixty-six thousand, six hundred and sixty-six is________.

There are about          teachers in our school.

___ years ago, the population of China was over 20 million.

About two _________boys took part in the running race.

_______ of the students in our class _______ interested in micro blogs (微博) on the Internet.

The survey shows that 200 students do different things during their vacations. ______ of them take classes according to the survey.