19. (A). Ellen is probably sick.

　　(B). Ellen enjoys winter weather.

　　(C). Ellen is really a warm person.

　　(D). Ellen is younger than she appears to be.

　　20. (A). George will need help if he enrolls in that course.

　　(B). George will enroll in that course if I take it.

　　(C). George won’t be able to help you if you enroll in that course.

　　(D). George plans to avoid enrolling in that course if possible.