单项选择题


Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage.
Beethoven established himself as the greatest composer

A.with his powerful middle-period works.
B.when his first three piano concertos were finished.
C.around 1802.
D.around 1795.