13.
A. Things on sale may be worth buying.
B. Things on sale are not worth buying.
C. Things on sale are out of style and season.
D. Things on sale are carefully looked over.
14.
A. The apartment is better furnished.
B. She prefers to live in a quiet place.
C. It's less expensive for her to live in an apartment.
D. She finds her roommates difficult to get along with.