Read the following passage and mark the letter A, B, C, or D to indicate the correct answer that best fits each of the numbered blanks.

When do people decide whether or not they want to become friends? During their first four minutes together, (21) ____________ a book by Doctor Leonard Zunin.

When we are introduced to new people, the author says, we must be (22) ____________ and self-confident. On the other hand, we should not be too sure of ourselves. It is important to be interested and sympathetic, realizing that the other person (23) ____________ his own needs, fears and hopes.

The author believes that interpersonal relations (24) ____________ be taught as a required course in every school, along with reading, writing and mathematics. In his opinion, success in life (25) ____________ mainly on how we get along with other people. That is at least very important.

During their first four minutes together, (21) ____________ a book by Doctor Leonard Zunin.