根据文章内容及首字母提示填空.

根据文章内容及首字母提示填空.
Today is a s___ day.Peter and Mum are going shopping.Now they are in the supermarket.Peter sees a bicycle.He wants to b___ it,because he can ride a bicycle very well.Today is Peter's birthday.So Mum gives the bicycle to Peter as a present.After Peter goes back home,he rides the bicycle on the grass.His f___,Mary sees and says to him:"The grass wants to g____.Don't ride on the grass.You can ride your bicycle on the p____".Then Peter goes to the playground.He rides and rides happily there.