Passage Three Questions 17 to 20 are based on the passage you have just heard.

A．To show that people are not comfortable with eye contact from strangers.
B．To show that strangers can get to know each other easily through eye contact.
C．To prove the point that people look more friendly with direct eye contact.
D．To prove the point that eye contact plays a role in social communication.

A．The nature and quality of subjects are more important than marks on them.
B．Teachers should force students to learn to red and write and calculate well.
C．Good preparation for standard tests is necessary for students.
D．Most students are clear about how to acquire basic skills.