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

A. he was more interested in human mind than the way the human body works
B. he focused his study on the human mind instead of human body
C. he shifted his attention to the study of psychology
D. he was most interested in the study of how human body works

A. The impulse to go online begins to affect other areas of life.
B. One begins to feel anxious or depressed or lonely if online.
C. One isn’t looking forward to being connected with other people online.
D. One is likely to be violent or crazy or aggressive if not online.