The rat has many enemies and its greatest enemy is man. Nevertheless, it is the survivor. Although man has (16) an unending war against them, rats have (17) the world. In almost every country, from the (18) cold of the Arctic regions to the unbearable (19) of the tropics, rats are (20) thriving, increasing and multiplying.

16（）

A. Love is liberating.
B. Love is willingly given.
C. Love means choosing the person you marry.
D. Love means that both sides are independent.

A. Chiefly because of his existence, I have become what I am.
B. I owe him a lot for the kind of person I am today.
C. He, more than anyone else, was responsible for what I am.
D. He was the person that urged me to strive for success.