Q:A mother wanted to encourage her son to play the piano. She bought tickets to the concert of a great pianist. When they arrived at the theater, the mother found a friend. Sbe stopped to talk to ber friend and her son ran off. At eight o'clock'the lights began to dim ,and the concert was set to start. The mother began to look for the boy. Then, she saw her 6-year-old son on stage. He was on the piano bench playing Twinkle, Twinkle little star. The mother was very shocked. Before she could get her son back, the famous pianist himself was on the stage and quickly moved to the piano. "Don't stop. Keep playing," he said kindly to the boy. The great pianist reached down with his left hand and began filling in the bass of the song. Soon, his right arm reached around the other side and played a beautiful piece of music. Together, the two impressed people with their beautiful music. In all of our lives, we receive helping hands- some we notice, some we don't. We also have Iots of chances to give helping hands- sometimes we want people to know, sometimes we don't. Little of what we all achieve comes without other's help. What we receive we should give back When the mother found her son playing on stage, she felt _ . A) happy B) encouraged C) interested D) surprised
A:
D