Hi everyone, my name is Emma. Today I like to invite you to explore with me the magic of sink. Let me begin with a story about myself.One day one of my classmate forgot to hand in his homework. When our teacher asked, "Any homework missing?" I quickly raised my hand and spoke up. Miss Marva, Adam didn't gave you his homework.At that moment, I thought I was helping and even expecting a thanks. To my surprise, he turned to me and shouted, "Hey, it none of your business." At first, I was hurt and confused, but ...