[C] contrast the ideas raised in paragraph 1.
[D] show us the writer\’s field of interest and expertise.
37. Why is it considered strange that there are so many shy people?
[A] Because it is considered by psychologists to be an undesirable trait.
[B] Because it is not a trait associated with social animals.
[C] Because our ancestors were not shy, so we should be like them.
[D] Because shy people could not have survived in early human society.
38. Which of the following people would psychologists certainly consider to be shy?
[A] A person who prefers to study alone rather than spend time with friends.
[B] A person who is afraid to talk to an attractive person of the opposite sex.
[C] A person who isn’t good at introducing themselves to new people.
[D] A person who feels exceptionally nervous when around unfamiliar people.
39. It is suggested that shy people might be confused because ________________
[A] they misinterpret other people’s facial expressions.