19. (A). I don’ t think the university usually offers an anthropology course.
(B). The university usually hires only one anthropology professor.
(C). I’d expect the university to have more anthropology classes.
(D). That particular anthropology course was offered only once at the university.
20. (A). Charles drives better than he used to.
(B). Charles’ roommate is a city bus driver.
(C). Charles rides to town with his roommate now.
(D). Charles and his roommate take the bus to town together.