Questions 19 to 21 are based on the passage you have just heard.

A. To find out whether they take music lessons in their spare time.
B. To find out whether they can name four different musical instruments.
C. To find out whether they enjoy playing musical instruments in school.
D. To find out whether they differ in their preference for musical instruments.

A. Because she’s unable to attend the study session.
B. Because she has seen a doctor recently.
C. Because she’s concerned about medical care.
D. Because she mentions the need for some medical tests.