A．Penicillin is a kind of antibiotics and it can kill bacteria.
B．All antibiotics can kill bacteria.
C．Some antibiotics just slow the bacteria down.
D．Thanks to penicillin, the woman’s father survived many years ago.

A．He learns more about what might happen to him.
B．He thinks about the situation and what to do about it.
C．He cares more about himself.
D．He is sure of the result he will get.