According to the passage, performers could best meet their obligation to composers by doing which of the following?

• A、Taking courses in art appreciation.
  
  

• B、Knowing how the music was intended to be performed.
  
  

• C、Studying works written at different periods in history.
  
  

• D、Rearranging musical scores for their particular instrument.
  
  

Task 2

21. The machinery outside the calorimeters records everything________

22. Nicola Waiters had time for the experiments________

23. Volunteers have to get prepared for the time in the calorimeter________

24. The experiments show that high-fat diets________

25. It seems Nicola will continue________

A. the volunteers do

B. to support their further sessions of experiment

C. because the life there can be very boring

D. make people overeat

E. because she was her own boss

F. after passing a high-protein test

What's the passage most likely to discuss in detail in the following paragraphs?

• A、How to grasp the technique of performing.
  
  

• B、How to acquire the understanding of music.
  
  

• C、How to educate first-class performers.
  
  

• D、How to write successful compositions.