A. People killed by it are the same in number with the people being infected with HIV.
B. It poses serious problems to human beings’ development both in medical and in social sense.
C. Most of the people killed by it are from the developing world.
D. 44% of women are HIV positive in some Southern African towns.

A. He refused to drive her.
B. He is glad to drive her.
C. He forgot his driving license.
D. He has a new car.