Read the following passage on commuting, and...

Câu hỏi: Read the following passage on commuting, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 51 to 60.

A. isolating antibiotics in cheese, sugar, and slime 

B. antibiotics in the field of medicine 

C. using folk medicines in place of modern medicines 

D. the validity of folk remedies and their use for advances in modem medicine