“不错，不错！”爷爷站在自选商店里把玩着一把牙刷，这是一把捏一捏牙刷杆就可以从里面自动挤出牙膏的保健牙刷。我看得出，爷爷喜欢得不得了。“牛孙子，你看这牙刷怎么样？”“好呀，您喜欢就买。”我忙着把几大包苏打饼干放进购物筐里，心想，反正是爷爷掏钱。“８元钱， “Good, not bad!” Grandpa stood playing in his own store with a toothbrush, which is a health care toothbrush that squeezes out toothpaste automatically from inside. I can see that Grandpa likes it so much. “Cow grandson, how do you look at this toothbrush?” “Well, you like to buy.” I was busy putting sachets into my shopping basket, thinking my grandpa would pay anyway. "8 dollars,