42. Which of the following is required of a visiting teacher? (A) Having taught at college (B) Working in the US before (C) Having a car of his or her own (D) Holding a degree from a university

48. What does Blachamn think about Google users in general? (A) They don’t know how to make full use of Google (B) They don’t know how to swim in an information ocean. (C) They have to take computer lessons to use Google. (D) They have to become a fan to be skillful Google users.