Câu hỏi 16. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 16 to 25.
Years ago,because of the lack of good medical care, diseases were the most terrible threat to the early people. Of course, they had no pills, tablets, or capsules as we do today. They uded to eat herbs or tree backs to cure many diseases. They also knew that food had great effects on their health. Actually, the medecines that we take today are mostly extracted from herbs, tree barks, plants, and food. For example, in the 17 th cetury, the Peruvian ate cinchona bark when they had a fever. They learned this from experience only.Until 1816, some phamacists extracted quinine from the cinchona bark. It is used in the treatment of malaria, a disease transmitted by the enopheles mosquitoes and common in the tropical countries. Qinine is also used to help cure other diseases.However, if a child uses quinine for a long time, he or she will have rickets.
Cau hoi so 16: The early people used ______ to treat diseases.