Mary runs ______ of all the girls in her school, and she won the 100-meter race last month.

We are taught that a business letter should be written in a formal style _____ in a personal one.

I hear____ boys in your school like playing football in their spare time, though others prefer basketball

Shanghai government is considering ____ 100%smoke-free public places by 2017.

Not until the party had begun _____. [ ]