(2014·石家庄高中复习教学质量检测)Seeing a large crowd at the street corner，I became aware of________unusual happening.

---Were your parents at home last night?---No. We ________ went to Grandma’s birthday party.

The manager believes prices will not rise by more than _____ four percent.

 I'm moving to the countryside because the air there is much fresher than _______ in the city.

I will appreciate       if you paid in cash.