1). ,:,!

2) Painting: "The sound of the piano is low for a while and high for a while; when it is low, it is like beads rolling on a plate, and when it is high, it is like thunder shaking the earth."

3) Beethoven practiced so hard that his fingers were so hot that he needed to cool down with cold water at any time. Because he was too nervous and in a hurry, the water splashed all over the floor and dripped downstairs along the cracks in the boards.

4) Simple, listen, concentrate, think.

5) C

6) The key to success like this is hard work. As long as you have perseverance, there is nothing you can’t do.

7) Focus on ' "Effort" organizes the words, persistent efforts, perseverance.

Hope it will be helpful to you O(∩_∩)O~